YOKOGAWA FLXA402 - MODBUS Master; Function Code;Exception Code

MODBUS Communication
3
TI 12A01F01-62EN
1.2 MODBUS master
l Maintenance
YOKOGAWA FieldMate is recommended for FLXA402 conguration via MODBUS.
FieldMate allows
• easy calibration by handheld FieldMate
• help function to setup temperature comp. table etc.
• remote control via Ethernet
• wide panel operation, larger than FLXA402
l Data memory
YOKOGAWA GX series with RS485 MODBUS are recommended for process data saving.
MODBUS communication enables to store larger amount of process data than FLXA402 mA
output.
1.3 Function code/Exception code
MODBUS Function code used for FLXA402
Function Function Code (hex)
Read Coils 01
Write Single Coil 05
Write Multiple Coils 0F
Read Input Register 04
Read Holding Registers 03
Write Single Register 06
Write Multiple Register 10
Read Device Identication 2B
Exception responses
Exception Code Name Meaning
0x01 Illegal Function The Function Code received in the query is not an
allowable action for the server or slave.
0x02 Illegal Data Address The data address received in the query is not an
allowable address for the server or slave.
0x03 Illegal Data Values The value contained in the query data eld is not an
allowable value for the server or slave.
If parameter setting fails because the setting is out of the range, Exception code 0x03 is replied
indicating a fail setting. When multiple parameters are to be set, even a single forbidden setting
makes all the other parameter setting fail.
Apr. 19, 2019-00