Panasonic LP-400 Series External Control Manual page 150

Troubles
The sending command is
not accepted by the laser
marker. (NAK response)
„Others
Troubles
Laser is emitted at
unintended timing.
Date is reset.
150
Causes
DIP switch No. 2 on back of laser
marker is off.
"Reception mode ON" is not set for
command reception permission (MKM
command)
Alarm or error occurs.
Two or more command data are
transmitted at the same time.
Causes
Photoelectric sensor for marking trigger
signal malfunctions.
Internal battery has run out.
ME-LP400V-EX-6
Measures
To control the following commands with the serial
communication, turn ON DIP switch No. 2.
• Laser Control [LSR]
• Shutter Control [SHT]
• Laser Check Radiation [SPT]
• Guide LD Indication [GID]
• Power Check [PWR]
The laser marker does not accept commands
except the following unless it is in the "reception
mode ON" status.
For command transmission, set "reception mode
ON" for "command reception permission (MKM
command)".
• File Change (No. Specified) [FNO]
• File Change (Comment Specified) [FNN]
• Shutter Control [SHT]
• Command Reception Permission [MKM]
• Laser Control [LSR]
• Counter Reset [CTR]
• Status Request [STS]
• Marking Trigger [MRK]
• Serial Data Input [SIN]
• Error code [ECR]
All commands except the following are refused
while alarm or error is active.
• When alarm occurred:
• Status Request [STS]
• Error code [ECR]
• When warning occurred:
• Status Request [STS]
• Error code [ECR]
• Shutter control [SHT] (for closing motion
only)
• Command Reception Permission [MKM]
(Only for reception mode ON and reception
mode readout)
After sending the command, confirm the response
data from the laser marker. Do not send the next
command before receiving the response.
Measures
Fumes may cause malfunction of photoelectric
sensor for marking trigger signal.
• Install dust collector.
• Check that dust collector works well.
Contact failure may also be a cause of this
symptom. When laser marker have been in use
for five years or more, internal battery is easy to
run out.
Contact our sales office for replacement of
internal battery.