BASEstartm Classic DAS
for Modicon®
Programmable Controllers
Installation and User's Guide


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3.3.4 Read Status

The read status function issues a diagnostic status request to the programmable controller, interprets the device response, and returns the interpretation as a character buffer.

The BASEstar Classic Command Line Interface User's Guide gives detailed information about the READ STATUS command. To display the returned values for device status, enter the following at the BASEstar Classic device connection management prompt:


DCM> READ STATUS device-name/FULL 

Example 3-5 shows an example of the values returned in the status buffer when you enter the command for reading device status.

Example 3-5 Read Status Screen

 
DCM> read status mod_984/full 
 
 Status of device mod_984 at dd-mmm-yyyy 09:50:54.72 
 
  Processor Type:       Modicon 984 
  Processor State:      STOPPED 
  Memory Protection:    OFF 
  Battery Status:       LOW 
 
  Machine Stop Status: 
    o Peripheral Port STOP State 
    o No one is currently logged in. 
 
 

3.3.4.1 Unsolicited Counters

For the host pseudo-device used to process unsolicited read and write requests from a Modbus-Plus device the read status command displays the number of read requests, the number of read request errors, the number of "trigger" notification sent, the number of write requests and the number of write request errors. "Triggers" and unsolicited read and write requests are discussed in Section 3.4.2.

For Modicon 984 and Quantum programmable controllers that support unsolicited data collection, the read status command also displays the information displayed for the host pseudo-device as well as the information displayed in Example 3-5. Unsolicited read and write requests are discussed in Section 3.4.2.

To reset the unsolicited counters maintained for the Modicon 984 or Quantum, use the "RESET" qualifer when reading status from the device.


DCM> read status mod_984/full/qualifier=reset 
 
 Status of device  mod_984  at dd-mmm-yyyy 13:21:34.91 
 
  Unsolicited read count         :0 
  Unsolicited read err count     :0 
  Unsolicited read trigger count :0 
  Unsolicited write count        :0 
  Unsolicited write err count    :0 
 
  Processor Type:       Modicon 984 
  Processor State:      RUNNING 
  Memory Protection:    OFF 
  Battery Status:       GOOD 
 
    o No one is currently logged in. 
 


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