GetCPUInfo return “invalid CPU answer"

[ThinkontrolSY]

test CPU: SIMENS S7-1211

func TestGetCpuInfo(t *testing.T) {
    handler := gos7.NewTCPClientHandler("192.168.1.3", 0, 1)
    handler.Timeout = 5 * time.Second
    handler.IdleTimeout = 5 * time.Second
    defer handler.Close()
    if err := handler.Connect(); err == nil {
        client := gos7.NewClient(handler)
        info, err := client.GetCPUInfo()
        t.Log(err)
        t.Log(info)
    } else {
        t.Fatal(err)
    }
}

return

=== RUN   TestGetCpuInfo
--- PASS: TestGetCpuInfo (0.07s)
    plc_test.go:20: CLI : invalid CPU answer
    plc_test.go:21: {    }