Parameter assignment/Addressing
5.1 MODBUS RTU
PAC RS485
32 Manual, 02/2008, A5E02091800B-01
FC 04
You can read out device registers with this function code.
Number of requested registers: At least 1 to maximum 125
Corresponding exception codes: 01, 02, 03 or 04
Corresponding error code: 0x84
FC 06
This function code overwrites a slave register with a new value.
Corresponding exception codes: 01, 02, 03 or 04
Corresponding error code: 0x86
FC 10
This function code writes a block of one to a maximum of 123 connected registers into the
device.
Corresponding exception codes: 01, 02, 03 or 04
Corresponding error code: 0x90
FC 2B
This function code reads a string. In conjunction with the MEIType 14 (0x0E), it reads the
Device Identification. The ReadDevID code 01 controls reading of the Basic Device
Identification. The object ID specifies whether the manufacturer, the manufacturer's device
name, or the firmware version/bootloader version is to be read.
Corresponding exception codes: 01, 02, 03 or 04
Corresponding error code: 0xAB
MODBUS Encapsulated Interface type
(MEItype)
0x0E
ReadDevID code
1)
01
1) Read Device Identification code
See also
MODBUS standard device identification with the function code 0x2B (Page 55)
Structure of the job message frame (Page 29)
Exception codes (Page 33)
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