Technical information

7777
Functions.
Operation
Counter channel block diagram
Depending on the counting function used (see functional characteristics page 78),
the I/O of the STBEHC3020KC module are assigned to:
 Input IN A, connected to a sensor.
 Inputs IN B, EN and RST, connected to a sensor or activated by the automation
island master controller via the eldbus.
The 16-bit counter value is compared to the two threshold values (congured with
the conguration software) and is used to activate the OUT 1 and OUT 2 outputs,
without requiring processing by the bus master controller.
Reports such as the counter value or the two status bits (counter status, compare
status) are sent to the bus master controller.
Modicon STB distributed I/O
solution
STBEHC3020KC counter module
IN A and IN
B counter
inputs
Output
function
block
Compare
block
EN and RST
auxiliary
inputs
24 V 0.5 A 
counter
outputs
OUT 1 and
OUT 2
Counter
status
High threshold
Low threshold
Island bus
master
Counter
block
Output
function
block
Compare
status
Counter and
capture
values