Yokogawa Removable Chassis DX1000N - Manual (Page 71)

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IM 04L41B01-17E
Using the Ethernet Interface
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App
Index
Resuming Command Transmission
You can use the front panel keys to resume command transmission to a server device to
which communication is stopped (red status) lamp
1. Using the up and down arrow keys, select the command corresponding to the server
device to which transmission will be resumed. The message “Push [right arrow] key
to refresh” appears.
2. Press the right arrow key. The DX starts command transmission to the specified
server.
Data When Communication Is Stopped and during Connection Retrials
If the command transmission stops such as due to a connection drop, the status turns
orange or red, and the communication input data and external input channel data are
error data. On communication channels, “+OVER” or –OVER is displayed according to
the DX settings. “*****” is displayed on external input channels.
Data Dropout
Data drop occurs when the commands from 1 to 16 do not complete within the read
cycle (see appendix 1). When a data dropout occurs, the communication input data is
held at the previous value. A message indicating the data dropout is also displayed on
the Modbus operating status display. If this happens, take measures such as making the
read cycle longer or reducing the number of commands. Confirm that no data dropout
occurs on the modbus status log screen.
1.10 Using the Modbus Client Function