Hitachi LM-C300 Series User Manual page 73

PLC CONNECTION:
Connection of PLC enables the user to carry out some operation automatically:
Select the number of the message to be printed (External Message):
These inputs are used to select the position of the message in the message table. This position is
selected by entering the relevant binary code.
The message selection bits are 8 bits from Bit 0 to Bit 7.
Voltage supply:
The customer connector provides different output voltages (+12 and +24V) for connecting peripherals
to the Laser Marker.
Interlock:
The Interlock connector allows security control over the laser beam. The interlock uses a relay to
detect the activation of a safety lock.
Serial communication:
This connector provides a method to control some functions of the Laser Marker from the remote
device, such as a PC, a Touch Screen or PLC.
Marking finished:
When printing of the message on the product is complete, the Laser Marker outputs the Marking
finished signal and notifies the production line.
PLC Start Mark:
This acts as a photocell. Therefore, the photocell type must be configured before starting the markings
using system set-up program. This signal is activated at a high level between 5 and 24 V DC and
should remain active (high level) for a period of time.
CmpReady (Printable mode):
This connector outputs this signal when the Laser Marker can be printed. This signal is controlled via
a relay (Normally Open and Normally Closed).
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