Zener MSC-3 Instruction Manual page 142

MSC-3 Start Up
Error:
Function code
Exception code
Function Code 07: Read Exception Status
Request:
Function code
Response:
Function code
Output data
Function Code 08: Diagnostics, Sub Codes 0, 2, 10...18, 20
Request:
Function code
Sub function
Data
Response:
Function code
Sub function
Data
Error:
Function code
Exception code
Function Code 15: Write Multiple Coils
128
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte 8
2 bytes
0, 0  Return query (request) data
0, 2  Return diagnostic register
0, 10  Clear counters and diagnostic register
0, 11  Return network message count
0, 12  Return network communication error count
0, 13  Return network exception error count
0, 14  Return slave message count
0, 15  Return slave no response count
0, 16  Return slave NAK count
0, 17  Return slave busy count
0, 18  Return network character overrun count
0, 20  Clear overrun counter and flag
2 bytes Data for MSC-3 MODBUS diagnostics
1 byte
2 bytes
2 bytes
1 byte
1 byte
IM00120 IM00120
134 (128+function code, 0x86)
1, 2 or 3
7
7
0 to 255
8
0,2,10...18,20
136 (128+function code, 0x88)
1 or 3