Behavior Of The Digital Inputs - Siemens simatic et 200s Operating Instructions Manual

2.6.8

Behavior of the Digital Inputs

Digital Input DI 3
You can assign parameters to the digital input DI 3 as one of the following:
● External pulse enable
● External STOP
Digital Input DI 3 as External Pulse Enable
The input must be put into operation. If the input is set and the parameter assignment
correct, the 1STEP 5V/204kHz is ready for operation.
Digital Input DI 3 as External STOP
Using this input, you can stop current positioning operations by means of an external signal.
REF Digital Input
Wire a normally open contact to this input for the reference cam.
You need a reference cam for the following:
● For a search for reference
● For an incremental run with STOP on the reference cam.
See also
Stopping the Stepping Motor (Page 37)
Pulse Enable (Page 39)
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
1STEP 5V/204kHz
2.6 Functions of the 1STEP 5V/204kHz
41