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281
ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
value as long as EXT_GATE_TRIG=0.
1
1
0
1
Count mode:
Counter counts/loads with each falling edge of EXT_GATE_TRIG independently
of the preselector value.
1
1
1
0
Trigger mode:
Counter counts/loads with internal clock dependent on the preselector value and
each falling edge of EXT_GATE_TRIG triggers the counter (sets the counter to
the load/reload value if the current counter value is unequal to the load/reload
value or has no effect if the current counter value is equal to the reload value).
1
1
1
1
Toggle mode:
Counter changes with each falling edge of EXT_GATE_TRIG independently of
the preselector value between
loading with load/reload value (if the current counter value is unequal to the
load/reload value)
and
down-counting (if the current counter value is equal to the load/reload value)
2.3.10.3.5 Timing requirements
The following applies to the TIMER submodule:
The minimum low pulse width and the minimum high pulse width of the signals
INT_GATE_TRIG, EXT_GATE_TRIG, EXT_EV1, EXT_EV2, INT_EV must be at least
one CLK_TIMT clock.
Furthermore it is required, that the active edges of the input signals at which the edge
evaluation is carried out must have a minimum distance according to the following table:
Signal
Minimum distance
INT_GATE_TRIG,
EXT_GATE_TRIG
At least three CLK_TIMT clocks;
The following applies additionally: If one of the signals INT_GATE_TRIG or
EXT_GATE_TRIG is used as a gate or trigger, it has to take at least three CLK_TIMT clocks
plus the number of CLK_TIMT clocks set in the preselector in order to become effective.
EXT_EV1, EXT_EV2,
INT_EV
At least two CLK_TIMT clocks
