I/O modules • 117
Counter modules 750-404/000-005
Modular I/O System
ETHERNET TCP/IP
Organization of the input and output data:
Attention
For the process data configuration of these bus modules please refer to chapter
"Process data architecture for MODBUS/TCP" in the process image descripti-
on of the corresponding coupler/controller.
The 2 channel rising edge up counter module 750-404/000-005 counts the pul-
ses at Clock1 and Clock2 inputs. The changes from 0 V to 24 V are counted.
The terminals O1 and O2 work as binary outputs. Each output can be activated
via specific bits in the CONTROL byte.
The high states of the input and output channels are each indicated by a LED.
The control byte has the following bits:
Bit 7 Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
x
Set coun-
ter 1
Set coun-
ter 2
Output
value at
output O2
Output
value at
output O1
x
x
The status byte has the following bits:
Bit 7 Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
x
x
Counter1
is set
Counter2
is set
Actual
signal at
output O2
Actual
signal at
output O1
Actual
signal at
input Clock
2
Actual
signal at
input Clock
1
With the control and Status byte the following tasks are possible:
Setting the counter:
Put Bit 5/4 into the control byte. The counter1/2 with the 32 bit value is loaded
into output bytes 0/1 respectively 2/3. As long as the bits are set, the counter
can stop and information is stored. The ensuing data of the counter will be
conveyed to bit 5/4 of status byte.
Setting the outputs:
Bits 2 and 3 set the additional two outputs of the counter module.
The result of the counter is in binary.
