Moeller XIOC, Hardware And Engineering

Page: 33 / 54

04/03 AWB2725-1452GB
Function summary
29
You can set the comparison value either at the start or during
operation. This does not depend on the counter being enabled at
the “Counter
n
Enable” input.
Example:
• Count direction: up
• Parameters: start value: 0, end value: 294, comparison
value: 200
Change actual value
You can change the actual value during counting. This does not
depend on the counter being enabled.
Requirement: start value F actual value F end value.
Example of a ring counter, with the functions:
• interrogate comparison value and reference signal
• reset outputs
• Set actual value
a figure 42
Additional functions for linear and ring counters
Regardless of the type of counter input (mode 1 to 4), you can set
the counter type (linear or ring counter) for each channel on the
operating mode switch of the module
a
page 22. You can also
assign other functions to the counter type, making the settings via
the switch:
Counter RUN/STOP when CPU has STOP state
Counter RUN: If the CPU is in the STOP state, the
encoder pulses continue to be counted.
Counter STOP: If the CPU is in the STOP state, no
pulses are counted
Polarity of the reference input
This function is only activated with a linear counter.
• Switch OFF: voltage at the input produces a “0” signal.
• Switch ON: voltage at the input produces a “1” signal.
Figure 41: Set module output (Latch)
198 199 200 295 0 1 2 201
1
0
Actual value
Latch output (=)
Equal flag
Figure 42: Example of a linear counter, with the functions “interrogate comparison value and reference signal” and “reset outputs”
623 10 11 364 365 426 623 624
Enable counter
Encoder pulse
Actual value
Set act. value (623)
Comp. value: 364
Enable Latch output
Latch output (=)
Reset Latch output
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