108
ifm
Device Manual IO-Link Master with Modbus interface CabinetLine 8 Ports IP 20 (AL1940)
05 / 2018
Appendix
ifm IoT Core
>
Service: subscribe
10920
Name:
subscribe
Description:
The service subscribes to the values of data points. The data points to be subscribed are
transferred as a list. The IO-Link master sends changes to the data drain defined in callback.
Applicable to:
Objects of the
event
type
Request data:
Data field
Required
field
Data type Default
Description
callback
mandatory
STRING
Address to which IoT Core event notifications are to be sent;
complete URL: http://ipaddress:port/path
datatosend
mandatory
ARRAY
OF
STRINGS
List from URLs of data elements; elements have to support
getdata
Return data (data):
none
>
Service: unsubscribe
16567
Name:
unsubscribe
Description:
The service deletes an existing subscription. unsubcribe is successful if cid and the
callback address are registered for a subscription (subscribe). If the STRING "DELETE" is provided in
callback, the IO-Link master deletes all active subscriptions.
Applicable to:
Objects of the
event
type
Request data:
Data field
Required
field
Data type Default
Description
callback
mandatory
STRING
Address to which IoT Core event notifications are to be sent;
complete URL: http://ipaddress:port/path
Return data (data):
none
