6. Function blocks
6.2 Interrupt function blocks
Operands Value inputs
NET stations n
IA - Analog input x
QA - Analog output x
QV - QV - Numeric output of a FB x
You can assign the following operands to the function block inputs that are bit inputs:
Operands Bit inputs
Constant 0, constant 1 x
M – Markers x
RN - Input bit via NET x
SN - Output bit via NET (send) x
N - Net marker bit x
nN - NET marker bit NET station n x
ID: Diagnostic alarm x
LE - Output backlight x
P buttons x
I - Bit input x
Q - Bit output x
Q - Bit output of a FB x
Operating modes
(Bit) Description Note
Counter with external direction
control
Pulse at device input I1 – I8, which
is defined as a counter input in the
parameters.
Duration signal at device input I1 –
I8, which specifies the counting dir-
ection.
0: up counting
1: down counting
Maximum frequency 5kHz
Counter with 2 counter inputs Pulse at device input I1 – I8 counts
up.
Pulse at device input I1 – I8 counts
down.
incremental counter X2
With automatic up/down counting dir-
ection detection, two counter inputs
I1…I8, counter input channel A,
pulse
I1…I8, counter input channel B,
pulse
When there is a complete channel A
and B period (e.g., first channel A
edge to next channel A edge), the
value at IC..QV is incremented or
decremented by 2 depending on the
408
easyE4 11/18 MN050009 EN www.eaton.com
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