Operation
Operating Instructions Option Module IEI for b maXX drive PLC BM4-O-
IEI-01
43
7
7.3.5
Counter preload register
The contents of counter preload register *.ud_COUNTER_PRELOAD are applied in
the IEI option module's internal counter if Bit 4 (Preload) is set in register
*.w_COUNTER_MODE.
This makes it possible to write a start value to the internal counter.
7.3.6
Latch3 disable register
This register only has a meaning in the IEI option module's encoder mode.
Using Latch3 disable register *.w_LATCH3_DISABLE, you can disable copying of the
IEI option module's internal counter to counter latch register 3
(*.ud_COUNTER_LATCH3) when latch condition 3 occurs.
This is necessary, for example, if you want to set or change latch condition 3 (in the latch
mode register).
*.w_LATCH3_DISABLE = 16#0001 disables copying of the IEI option module's internal
counter to counter latch register 3.
*.w_LATCH3_DISABLE = 16#0000 reenables copying of the IEI option module's inter-
nal counter to counter latch register 3.
The default setting is *.w_LATCH3_DISABLE = 16#0000, i.e. copying of the IEI option
module's internal counter to counter latch register 3 is enabled.
7.3.7
Latch2 disable register
This register only has a meaning in the IEI option module's encoder mode.
Using Latch2 disable register *.w_LATCH2_DISABLE, you can disable copying of the
IEI option module's internal counter to counter latch register 2
(*.ud_COUNTER_LATCH2) when latch condition 2 occurs.
This is necessary, for example, if you want to set or change latch condition 2 (in the latch
mode register).
*.w_LATCH2_DISABLE = 16#0001 disables copying of the IEI option module's internal
counter to counter latch register 2.
*.w_LATCH2_DISABLE = 16#0000 reenables copying of the IEI option module's inter-
nal counter to counter latch register 2.
The default setting is *.w_LATCH2_DISABLE = 16#0000, i.e. copying of the IEI option
module's internal counter to counter latch register 2 is enabled.
7.3.8
Latch3 once register
This register only has a meaning in the IEI option module's encoder mode.
Using Latch3 once register *.w_LATCH3_ONCE, you can set copying once of the IEI
option module's internal counter to counter latch register 3 (*.ud_COUNTER_LATCH3)
when latch condition 3 occurs. The system does not evaluate any further occurrences of
latch condition 3.
After counter latch register 3 has been overwritten with a value of 0
(*.ud_COUNTER_LATCH3 = 0), the system again copies the value of the internal
counter to counter latch register 3 when latch condition 3 occurs.