11
Commissioning with TwinCAT®
ID 441896.05
WE KEEP THINGS MOVING
Operation manual
74
To fully retain the function, the parameter for the Timeout function must also be
set in the inverter (parameter A258).
With the setting A258 = 65534 the timeout for the monitoring by the "SM
Watchdog" functionality is set from the EtherCAT master. Diagnostics on this
function set externally are undertaken in the inverter in the parameter A259.
5. 5.In the input fields Set Multiplier and Set SM Watchdog enter the values for
calculating the SM Watchdog time. The SM Watchdog time is calculated with
the following formula:
SM Watchdog time = (Multiplier * 0.04 * 10
-6
s) * SM Watchdog
The time in the example shown in is calculated as follows:
SM Watchdog time = (25000 * 0.04 * 10
-6
s) * 2000 = 2 s = 2000 ms
You have completely parameterized the SM Watchdog function
(Changes will only be effective after a system re-start or change in the
EtherCAT master state from INIT to OP). If you used the values from our
example you will have parameterized a timeout time of 2 seconds.
Fig. 11-7 Setting the SM Watchdog function on the TwinCAT System
Manager
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