Watlow PPC-2000 - Manual (Page 307)

PPC-2000 User’s Guide Appendix A: Modbus Protocol
Doc.# 30002-00 Rev 2.3 Watlow Anafaze 279
Diagnostics Subfunction -- Return Bus Communication
Error Count 12 (0C Hex)
The response data field returns the quantity of CRC errors
encountered by the slave since its last restart, clear counters
operation, or power-up.
Subfunction Data Field (Query) Data Field
(Response)
00 0C 00 00 CRC Error Count
Diagnostics Subfunction -- Return Bus Exception Error
Count 13 (0D Hex)
The response data field returns the quantity of Modbus
exception responses returned by the slave since its last restart,
clear counters operation, or power-up.
Subfunction Data Field (Query) Data Field
(Response)
00 0D 00 00 Exception Error Count
Diagnostics Subfunction -- 14 (0E Hex) Return Slave
Message Count
The response data field returns the quantity of messages
addressed to the slave, or broadcast, that the slave has
processed since its last restart, clear counters operation, or
power-up.
Subfunction Data Field (Query) Data Field
(Response)
00 0E 00 00 Slave Message Count
Diagnostics Subfunction -- Return Slave No Response
Count 15 (0F Hex)
The response data field returns the quantity of messages
addressed to the slave for which it returned a no response
(neither a normal response nor an exception response), since its
last restart, clear counters operation, or power-up.
Subfunction Data Field (Query) Data Field
(Response)
00 0F 00 00 Slave No Response
Count