Yokogawa Button Operated MV2000 - Manual (Page 159)

7-6 M-4662
Modbus Server Function
Modbus Server Specifications
Communication available via ModbusTCP
Communication media: Ethernet 10Base-T
Port:
502/tcp (default value)
Command wait timeout: 1 minute. However, the timeout to receive the entire command
after starting to receive a command is 10 seconds.
Maximum number of connections: 2
Supported functions:
The table below contain functions that the MV supports.
Function
Code Function Operation
3 Reads the hold register
(4XXXX) The client device reads the communication input
data and external input channel data from the MV.
4 Reads the input register
(3XXXX) The client device reads the computed, measured,
alarm, and time data from the MV.
6 Writes once to hold
register (4XXXX) The client device writes data to the
communication input channel and external input
channel on the MV.
8 Loopback test The client device performs a loopback test on the
MV.
16 Writes to hold register
(4XXXX) The client device writes data to the
communication input channel and external input
channel on the MV.
Register Assignments (shared with the Modbus slave function)
Measurement channel
Computation channel
External input channel
Measurement channel
Computation channel
External input channel
Time
Measured data
Alarm status
Computed data
Alarm status
Measured data
Alarm status
Alarm list
Alarm list
Alarm list
Data type
16-bit signed integer
Bit string
32-bit signed integer
Bit string
16-bit signed integer
Bit string
Bit string
Bit string
Bit string
16-bit signed integer
Number
30001 to 30048
31001 to 31048
32001 to 32120
33001 to 33060
34001 to 34240
35001 to 35240
36001 to 36012
36021 to 36035
36041 to 36100
39001 to 39008
Data type MV input register
Communication input data
Measured data of external input channel
Data type
16-bit signed integer
32-bit floating point
16-bit signed integer
Number
40001 to 40060
40301 to 40420
41001 to 41240
Data type MV hold register
Client
Read
Client
Read Write
7.3 Modbus Protocol Specifications