6. CONNECTION OF I/O UNITS TO
The operator’s panel I/O module is allocated a group of DI addresses (16
bytes) and a group of DO addresses (8 bytes). This address allocation is
The MPG interface (MPG counter) occupies DI space from Xm+12
through Xm+14. These addresses are fixed, and Xm+12 through Xm+14
must be allocated as a DI work area to enable the use of the MPG.
Therefore, when using an MPG, allocate DI addresses in units of 16 bytes.
Do not use the DI space from Xm+12 through Xm+14 for Ladder; the
Power Mate processes the MPG counter value directly.
DI address Xm+15 is used for detecting overcurrent and overheating
alarms that may occur in the IC used in the DO driver. [For details, see
the section describing the detection of DO (output signal) alarms.] This
address is fixed, and must be allocated as a work area before it can be used.
Therefore, when using this area, allocate DI addresses in units of 16 bytes.
Turning the DO (output signal) power on and off (DOCOM)
All the DO signals can be turned off simultaneously by turning off
(opening) the DO (output signal) power supply pin “DOCOM”. Doing
so causes the DO signal status to change as shown below.
When DO is ON in the
When DO is OFF in the
1 When the DO signal is in the ON state in the sequence, the
ON or OFF state of the DOCOM pin determines the state of
the signal, as indicated by the dotted lines in the above
2 Do not turn off the +24 V supply, provided by the CPD1 to
the I/O module, during the operation. Turning off the +24 V
supply would cause a Power Mate communication alarm.
When turning on the power, the +24 V supply to the I/O
module must be turned on before or at the same time as the
power supply to the Power Mate. When turning off the
power, the +24 V supply to the I/O module must be turned
off after or at the same time as the power supply to the