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steveohara / j2mod

Enhanced Modbus library implemented in the Java programming language
Apache License 2.0
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Holding register function not working as per expectation in rtu mode of modbus slave #106

Closed DhruvilDhanani closed 4 years ago

DhruvilDhanani commented 4 years ago

Expected Behavior

All the request from master is served by serial slave without timeout

Actual Behavior

Some of the request of master is not served by the server. This issue is occur if starting address of holding register is 0. Other than 0 address slave functionality working as per expectation.

Steps to Reproduce the Problem

  1. Create the serial slave using the library
  2. Add the process image of holding register in serial slave
  3. Read data from serial master

Specifications

Modbus master frame:

[RTU]>Tx > 13:59:29:162 - 01 03 00 00 00 05 85 C9
[RTU]>Rx > 13:59:29:225 - 01 03 0A 00 0B 00 16 00 21 00 2C 00 37 1C 5F
[RTU]>Tx > 13:59:30:570 - 01 03 00 00 00 05 85 C9
Sys > 13:59:31:072 - Error : Timeout [RTU]>Tx > 13:59:41:122 - 01 03 00 00 00 05 85 C9
Sys > 13:59:41:623 - Error : Timeout [RTU]>Tx > 13:59:42:288 - 01 03 00 00 00 05 85 C9
[RTU]>Rx > 13:59:42:372 - 01 03 0A 00 0B 00 16 00 21 00 2C 00 37 1C 5F
[RTU]>Tx > 13:59:44:306 - 01 03 00 00 00 05 85 C9
[RTU]>Rx > 13:59:44:389 - 01 03 0A 00 0B 00 16 00 21 00 2C 00 37 1C 5F

Modbus slave log by debugging 2020-03-23 08:32:31,295 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Request: 01 03 00 00 00 05 85 C9 2020-03-23 08:32:31,296 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:31,297 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=0 2020-03-23 08:32:31,298 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:31,299 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=1 2020-03-23 08:32:31,300 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:31,301 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=2 2020-03-23 08:32:31,302 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:31,303 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=3 2020-03-23 08:32:31,304 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:31,305 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=4 2020-03-23 08:32:31,305 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:31,306 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=5 2020-03-23 08:32:31,307 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Request:01 03 00 00 00 05 2020-03-23 08:32:31,309 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Response:01 03 0A 00 0B 00 16 00 21 00 2C 00 37 2020-03-23 08:32:31,311 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Sent: 01 03 0A 00 0B 00 16 00 21 00 2C 00 37 1C 5F 2020-03-23 08:32:32,295 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Request: 01 03 00 00 00 05 85 C9 2020-03-23 08:32:32,297 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:32,298 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=0 2020-03-23 08:32:32,299 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:32,299 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=1 2020-03-23 08:32:32,300 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:32,301 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=2 2020-03-23 08:32:32,302 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:32,302 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=3 2020-03-23 08:32:32,303 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:32,304 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=4 2020-03-23 08:32:32,305 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:32,306 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=5 2020-03-23 08:32:32,307 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Request:01 03 00 00 00 05 2020-03-23 08:32:32,309 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Response:01 03 0A 00 0B 00 16 00 21 00 2C 00 37 2020-03-23 08:32:32,311 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Sent: 01 03 0A 00 0B 00 16 00 21 00 2C 00 37 1C 5F 2020-03-23 08:32:33,294 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Request: 01 03 00 00 00 05 85 C9 2020-03-23 08:32:33,295 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:33,296 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=0 2020-03-23 08:32:33,297 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:33,298 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=1 2020-03-23 08:32:33,299 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:33,300 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=2 2020-03-23 08:32:33,301 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:33,301 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=3 2020-03-23 08:32:33,302 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:33,303 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=4 2020-03-23 08:32:33,304 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:33,305 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=5 2020-03-23 08:32:33,306 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Request:01 03 00 00 00 05 2020-03-23 08:32:33,308 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Response:01 03 0A 00 0B 00 16 00 21 00 2C 00 37 2020-03-23 08:32:33,310 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Sent: 01 03 0A 00 0B 00 16 00 21 00 2C 00 37 1C 5F 2020-03-23 08:32:34,297 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:34,300 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:34,304 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:34,308 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:34,311 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:34,313 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:34,316 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 4166 microsec 2020-03-23 08:32:34,322 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Read message not meant for us: 00 00 FF FF 00 05 85 C9 2020-03-23 08:32:35,292 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:35,294 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:35,296 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:35,298 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:35,300 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:35,302 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:35,305 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:35,307 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:35,310 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 4166 microsec 2020-03-23 08:32:35,315 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Read message not meant for us: 00 00 FF FF 00 05 85 C9 2020-03-23 08:32:36,303 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:36,305 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:36,307 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:36,310 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:36,312 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:36,314 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:36,316 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:36,318 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 2083 microsec 2020-03-23 08:32:36,321 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Waiting for 4166 microsec 2020-03-23 08:32:36,327 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Read message not meant for us: 00 00 FF FF 00 05 85 C9 2020-03-23 08:32:37,312 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Request: 01 03 00 00 00 05 85 C9 2020-03-23 08:32:37,314 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:37,315 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=0 2020-03-23 08:32:37,316 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:37,317 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=1 2020-03-23 08:32:37,318 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:37,319 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=2 2020-03-23 08:32:37,320 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:37,321 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=3 2020-03-23 08:32:37,322 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:37,322 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=4 2020-03-23 08:32:37,323 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:37,324 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=5 2020-03-23 08:32:37,325 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Request:01 03 00 00 00 05 2020-03-23 08:32:37,340 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Response:01 03 0A 00 0B 00 16 00 21 00 2C 00 37 2020-03-23 08:32:37,341 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Sent: 01 03 0A 00 0B 00 16 00 21 00 2C 00 37 1C 5F 2020-03-23 08:32:38,308 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Request: 01 03 00 00 00 05 85 C9 2020-03-23 08:32:38,310 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:38,311 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=0 2020-03-23 08:32:38,311 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:38,312 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=1 2020-03-23 08:32:38,313 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:38,324 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=2 2020-03-23 08:32:38,327 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:38,329 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=3 2020-03-23 08:32:38,330 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:38,331 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=4 2020-03-23 08:32:38,332 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - read() 2020-03-23 08:32:38,333 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.FastByteArrayInputStream - count=6 pos=5 2020-03-23 08:32:38,339 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Request:01 03 00 00 00 05 2020-03-23 08:32:38,339 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.n.AbstractModbusListener - Response:01 03 0A 00 0B 00 16 00 21 00 2C 00 37 2020-03-23 08:32:38,340 [Modbus Serial Listener [port:/dev/ttyS1]] DEBUG c.g.j.m.i.ModbusRTUTransport - Sent: 01 03 0A 00 0B 00 16 00 21 00 2C 00 37 1C 5F

P.S: Input register functionality is working as per expectation with starting address 0.

steveohara commented 4 years ago

I think this is working as expected. j2mod addresses use the Modbus Number policy which is one based. So the first coil/register number is 1, not zero

DhruvilDhanani commented 4 years ago

Issue is in the serial communication frame. If data frame is valid then application working as per expected. So, Closing this issue.