
8–8
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL
SUPPORTED MODBUS FUNCTIONS
CHAPTER 8: COMMUNICATIONS
8.2.6
Function Code
06h
Modbus implementation: Preset single register
MM3 Motor Manager 3 implementation: Store single setpoint
This command allows the master to store a single setpoint into the memory of a MM3
Motor Manager 3. The slave response to this function code is to echo the entire master
transmission.
For example, request slave 17 to store the value 01F4 in setpoint address 1020. After the
transmission in this example is complete, setpoints address 1020 will contain the value
01F4. The master/slave packet format is shown below:
8.2.7
Function Code
07h
Modbus implementation: Read exception status
MM3 Motor Manager 3 implementation: Read device status
This is a function used to quickly read the status of a selected device. A short message
length allows for rapid reading of status. The status byte returned will have individual bits
set to 1 or 0 depending on the status of the slave device. For this example, consider the
following MM3 Motor Manager 3 general status byte:
The master/slave packets have the following format:
Master transmission
Bytes
Example
Description
Slave address
1
11
message for slave 17
Function code
1
06
store single setpoint
Data starting address
2
10 20
setpoint address 1020h
Data word
2
01 F4
data for setpoint address 1020h
CRC
2
8E 47
computed CRC error code
Slave response
Bytes
Example
Description
Slave address
1
11
message from slave 17
Function code
1
06
store single setpoint
Data starting address
2
10 20
setpoint address 1020h
Data
2
01 F4
data stored in address 1020h
CRC
2
8E 47
computed CRC error code
Bit
Description
Bit 0 (LSB)
Alarm condition = 1 (least significant bit)
Bit 1
Trip condition = 1
Bit 2
Internal fault = 1
Bit 3
Auto mode selected = 1
Bit 4
Contactor A N/O (input closed = 1, open = 0)
Bit 5
Contactor B N/O (input closed = 1, open = 0)
Bit 6
Auxiliary relay 1 status
Bit 7 (MSB)
Auxiliary relay 2 status (most significant bit)
Master transmission
Bytes
Example
Description
Slave address
1
11
message for slave 17
Function code
1
07
read device status
CRC
2
4C 22
computed CRC error code
Summary of Contents for MM3
Page 8: ...vi MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL TABLE OF CONTENTS ...
Page 18: ...1 10 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL TECHNICAL SPECIFICATIONS CHAPTER 1 INTRODUCTION ...
Page 80: ...4 18 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL CHASSIS MOUNT UNITS CHAPTER 4 SOFTWARE ...
Page 124: ...5 44 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL S7 TESTING CHAPTER 5 SETPOINTS ...
Page 198: ...8 54 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL MODBUS MEMORY MAP CHAPTER 8 COMMUNICATIONS ...
Page 220: ...10 14 MM3 MOTOR MANAGER 3 INSTRUCTION MANUAL GE MULTILIN WARRANTY CHAPTER 10 MISCELLANEOUS ...