Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 66)

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M-4659
Modbus master
Click to display the channel selection screen
Modbus master settings are enabled when you set [Protocol] to [Master] under [Serial] -
[Serial] in the [Basic Setting] tab.
Basic setting
• Read cycle
Set the read cycle to 125ms, 250ms, 500ms, 1s, 2s, 5s, or 10s.
• Timeout
Set the command timeout value to 125ms, 250ms, 500ms, 1s, 2s, 5s, 10s, or 1min.
• Retrials
Set the number of retrials when there is no response from the slave. Select OFF, 1, 2,
3, 4, 5, 10, or 20.
• Inter-block delay
Set the inter-block delay to OFF, 5ms, 10ms, 15ms, 45ms, or 100ms.
• Auto recovery
Set the auto recovery time from communication halt. Select OFF, 1min, 2min, 5min,
10min, 20min, 30min, or 1h.
Command setting
• Master command No.
Select from 1 to 16 for the command numbers to be configured.
• Command
Set the transmitted command type.
Settings Description
Read Read to the external input channel (16-bit signed integer type) from the slave.
R-Math Read to the communication input channel (32-bit floating point type) from the
slave.
Write Write the measurement channel (16-bit signed integer type) to the slave.
W-Math Write the measurement channel (32-bit signed integer type) to the slave.
[Read] can be selected on DX2000s with the external input channel (/MC1 option) installed.
[R-Math] and [W-Mat] can be selected on models with the computation function (/M1 option)
installed.
• Start channel/End channel (master channel numbers)
Enter the first and last channel numbers of input/output. The range of channels that
you can enter varies depending on the command type as follows:
Read: 201 to 440, R-Math: C01 to C60, Write: 1 to 48, W-Math: 101 to 160
3.6 Entering Basic Settings