Yokogawa Value Series FX1000 - Manual (Page 180)

6-6
IM 04L21B01-17EN
Modbus Server Function
Modbus Server Specifications
Communicate via ModbusTCP
Communication media: Ethernet 10Base-T
Port:
502/tcp (default value)
Command wait timeout: 1 minute. However, the timeout to receive the command after
starting to receive the command is 10 seconds.
Maximum number of connections:
2
Supported functions: The functions that the FX supports are listed below.
Function
Code
Function Operation
3 Read the hold register (4XXXXX) The client device reads the FX’s communication input
data.
4 Read the input register
(3XXXXX)
The client device reads the computed, measured,
alarm, and time data of the FX.
6 Single write to hold register
(4XXXXX)
The client device writes to the communication input
data of the FX.
8 Loopback test The client device performs a loopback test of the FX.
16 Write to the hold register
(4XXXXX)
The master device writes to the communication input
data of the FX.
Register assignments (shared with the Modbus slave function)
Measurement ch.
Computation ch.
Measurement ch.
Computation ch.
Time
Measured data
Alarm status
Computed data
Alarm status
Alarm list
Alarm list
Type
16-bit signed integer
Bit string
32-bit signed integer
Bit string
Bit string
Bit string
16-bit signed integer
Number
300001 to 300012
301001 to 301012
302001 to 302048
303001 to 303024
306001 to 306003
306021 to 306026
309001 to 309008
Kind Input register
Communication input data
Data type
16-bit signed integer
32-bit floating point
Number
400001 to 400024
400301 to 400348
See “Operating Devices” under “Hold Register.”
Kind Hold register
Client
Read
Client
Read Write
Operating devices
6.3 Modbus Protocol Specifications