Siemens SIMATIC ET 200S - Parameters for 4 DI NAMUR

1PosUniversal/Digital
7.6 Functions of the 1PosU
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
323
Principle
What You Do Response of the 1PosU
Provide the control interface with data corresponding to
the JOB.
Check the JOB_ACK feedback bit is at 0
Switch the JOB_REQ control bit from 1 to 0 The 1PosU sets the feedback bit JOB_ACK = 1
This indicates that the initiation of the 1PosU has been detected
and that the JOB will be executed when JOB_ERR = 0.
• In the case of the function for evaluating a reference signal,
the 1PosU sets the SYNC = 0 feedback bit at the same time.
• In the case of the latch function, the 1PosU sets the
feedback bit LATCH_DONE = 0 at the same time.
• All the other JOBs are thus executed.
The JOB is not executed when JOB_ERR = 1.
Switch the JOB_REQ control bit from 1 to 0 The 1PosU sets the feedback bit JOB_ACK = 0
When a reference signal is evaluated, the 1PosU sets the
feedback bit SYNC = 1 when the function has been executed.
In the case of the latch function, the 1PosU sets the feedback bit
LATCH_DONE = 1 when the function has been executed.
Only when JOB_ACK = 0 can you activate a new JOB again.
-2%
B
(55
/$7&+B'21(
6<1&
-2%B$&.
-2%B5(4
RU
Figure 7-6 Control and Feedback Signals with JOBs