Performing Commands Using Function Code 10H - GE Multilin MM200 Communications Manual

CHAPTER 2: RS485 INTERFACE (MODBUS RTU)

Performing Commands Using Function Code 10H

MM200 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
Code Type
Bit 1
Bit 2
Bit 3
Bit 4
Bit 8
Bit 9
Bit 15
Bit 16
Bit 17
Bit 18
Commands can be performed using function code 16 as well as function code 5. When
using FUNCTION CODE 16, the Command Function register must be written with a value of
5. The Command Operation register must be written with a valid command operation
number. The Command Data registers must be written with valid data; this is dependent
upon the command operation.
For example, consider a request for slave 17 to perform command operation 1 (RESET): The
master/slave packets have the following format:
Table 2-9: MASTER/SLAVE PACKET FORMAT FOR PERFORMING COMMANDS
MASTER TRANSMISSION
SLAVE ADDRESS
FUNCTION CODE
DATA STARTING ADDRESS
NUMBER OF SETPOINTS
BYTE COUNT
DATA 1
DATA 2
CRC
SLAVE RESPONSE
SLAVE ADDRESS
FUNCTION CODE
DATA STARTING ADDRESS
NUMBER OF SETPOINTS
CRC
PERFORMING COMMANDS USING FUNCTION CODE 10H
Definition
Thermal Inhibit
AutoMode
Manual Mode
AutoManualMode
Forward Limit
Reverse Limit
Comms Ctrl Active
Hard Wired Ctrl Active
Field Ctrl Active
MCC Ctrl Active
BYTES EXAMPLE
1 11
1 10
2 00 80
2 00 02
1 04
2 00 05
2 00 01
2 7E CE
BYTES EXAMPLE
1 11
1 10
2 00 80
2 00 02
2 42 B0
DESCRIPTION
message for slave 17
store multiple
setpoints
setpoint address 00
80
2 setpoints = 4 bytes
total
4 bytes of data
data for address 00
80
data for address 00
81
CRC error code
DESCRIPTION
message from slave
17
store multiple
setpoints
setpoint address 00
80
2 setpoints
CRC error code
2-25