Accutech WI-BR-I-XP, User Manual

Rev 1.56 

19 

6.3.4: Command 12- 
Get Com Event Log 

This command returns a status word, communications event counter, mes-
sage count, and a field of bytes from the communications event log.  The 
status word and communications event counter are identical to those re-
turned by Command 11 (Get Com Event Counter) above.  The message 
count is a count of the total number of messages received by this device, 
including messages intended specifically for this device as well as other 
devices on the Modbus network.  The event log keeps track of information 
on the last 7 communications events.  Note that identical information is 
returned for any device ID that the Base Radio is controlling (i.e. includ-
ing Field Units mapped to virtual device IDs when operating in the device 
ID mapping mode). 
 
 For further details on this command, please consult the Modbus protocol 
specification.. 

6.3.5: Command 17-  
Report Slave ID 

This command returns the device type, device status, and a run indicator 
status byte.  The 16-bit device type and device status words are identical to 
those held in the holding registers.  The run indicator status byte is 255 
(0xFF hex) if the device is online and 0 (0x00 hex) if the device is offline.  
Unlike some of the other diagnostics commands, different information is 
returned depending on whether the device ID used in this command corre-
sponds to the Base Radio or one of the Field Units mapped to a device ID 
when operating in the device ID mapping mode. 
 
 For further details on this command, please consult the Modbus protocol 
specification. 

6.3.5: Command 43-  
Read Device ID 

This command returns identification information relating to the device.  
The conformity level of this command is level 01, basic identification 
(stream access only).  As with most of the other diagnostic commands, 
identical information is returned for any device ID that the Base Radio is 
controlling (i.e. including Field Units mapped to virtual device IDs when 
operating in the device ID mapping mode). 
 
 For further details on this command, please consult the Modbus protocol 
specification.