Rockwell Automation 440R-D22R2, Руководство пользователя

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Rockwell Automation Publication 440R-UM013F-EN-P - July 2021 41
Chapter 7 EMD Safety Relay Timing Functions
Figure 34 - On-delay Timing Diagram
Case 1
1. The logic link signal at terminal L12 turns on, and the on-delay timer
starts.
2. The on-delay timer elapses, and the safety outputs turn on.
3. When the logic link signal turns off, the safety outputs turn off.
Case 2
4. The logic link signal at terminal L12 turns on, and the on-delay timer
starts.
5. The logic link signal turns off before the on-delay time elapses. The on-
delay timer is reset to zero. No fault occurs.
6. After a brief interruption (even as short as 100 ms), the logic link signal
turns back on. The on-delay timer starts from zero.
7. The on-delay timer elapses, and the safety outputs turn on.
8. When the logic link signal turns off, the safety outputs turn off.
Jog
The jog function has two timers: an on-timer and an off-timer. The Range and
Time switch settings set the on-timer during configuration. The on-timer
starts when both the B1 terminal is connected to 24V DC and the logic link
signal at terminal L12 is on. The order in which these two signals turn on is not
relevant. When both signals are on, the safety outputs turn on during the on-
timer. After the on-timer expires, the safety outputs turn off and the off-timer
starts. The off-timer is fixed at 500 ms. After the safety outputs turn off, they
remain off unit the off-timer elapses. Then the jog can be restarted.
Figure 35
shows three cases of timing sequences.
During the on-timer cycle, the Logic IN indicator flashes at a 1 Hz rate. During
the off-timer cycle, the Logic IN indicator flashes at an 8 Hz rate.
Figure 35 - Jog Timing Diagram
t t
1 2 3 4 5 6 7 8
t
Case 1 Case 2
L12
Safety
Output
t t t
1 2 3 4 5 6 7 12 13 14 15 8 9 10 11
t
Case 1 Case 2
L12
Safety
Output
B1
Case 3