Modbus debugging
Debug screen in Modbus slave type
At a Glance
Type Window
Counters
Window z z z
The specific part is divided into three windows: the Type window, the Counters window, the Channel test window: this window cannot be used in this mode.
The window is as below:
Type
Slave
It recalls the type of Modbus function configured (slave).
The window is as below:
Counters
Received without CRC error
Received with exception code
Reception broadcast
Slave BUSY or LOM
0
0
0
0
Received with CRC error
Message for the CPU
Sent with NACK
Character error
Reset counters
0
0
0
0
This window displays the different counters (in slave configuration).
the Reset counters button resets these counters to zero.
Counter Slave Busy or LOM: z Slave Busy: this counter is incremented by the slave when it receives a request from the master while in the process of processing another request. This happens z when the master sends a request. It does not wait for a response from the slave and may send another request,
Slave LOM: (Listen Only Mode) is the operating mode of a slave which is only in listen mode. It never responds to frames sent by the master. In this case, this counter indicates the number of frames received by the slave.
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35013154.02 07/2008
