Emsa HS500E manual Write Tag Name / Write File Address, Read Settings

C H A P T E R 5 : E T H E R N E T / I P P R O T O C O L

9Write Tag Name / Write File Address:

a.For ControlLogix: Specify a Write Tag Name that is 40 characters or less. The Write Tag Name refers to the name of the Controller Tag in the PLC where the HS500E will write PLC-bound data for Node 01 (example: EMS_WRITE1). Note: this is not to be confused with writing to an RFID transponder, which is often referred to as “writing to a tag.”

OR

b.For SLC505: Enter a value in each of the two Write File Address fields. The first field contains the number of the (write) Status File on the PLC (for example: N7). The second field contains the Write File Offset. Together these values indicate the location in the PLC’s Status File where the HS500E will write Host-bound data.

10Enter a number between 5 and 6000 to indicate the number of ticks for the Write Heartbeat Timeout (5 ticks = 50ms, 6000 ticks = 1 minute, 0 ticks = disabled). This value represents the frequency at which the HS500E will write data to the Write Tag (or the Write File Address) in the PLC when there is Host-bound data waiting.

Read Settings

11Specify the number of words (between 1 and 100, 0 = disabled) for the Max Read Size. The Max Read Size value represents the maximum number of 2- byte “words” that the HS500E will attempt to retrieve from PLC memory during a single command-response cycle. Note: the actual data size required on the PLC is 3 words larger than the value specified in this field.

12Read Tag Name / Read File Address:

a.For ControlLogix: Specify a Read Tag Name that is 40 characters or less. The Read Tag Name refers to the name of the tag in PLC memory from which the HS500E will retrieve data.

OR

b.For SLC505: Enter a value in each of the two Read File Address fields. The first field contains the number of the (read) Status File on the PLC (for example: N7). The second field contains the Read File Offset. Together these values indicate the location in the PLC status file from which the HS500E will retrieve data.

13Enter a value between 5 and 6000 to indicate the number of ticks for the Read Poll Rate. (5 ticks = 50ms, 6000 ticks = 1 minute, 0 ticks = disabled) This value represents the frequency at which the HS500E will poll the Read Tag (or the Read File Address) in PLC memory. Polling is the act of repeatedly querying a specific memory location for the presence of new data.

14After you have entered the proper information on this page, click the Save Settings button. Your changes will be stored and you will be returned to the OnDemand Configuration Page.

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