Panasonic FP2 - Manual (Page 40)

FP2−CCU Troubleshooting
5 − 4
5.1 Operation if an Error Occurs
5.1.2 If the ERROR LED on the Computer Communication Unit Lights
What the ERROR LED does
The ERROR LED on the Computer Communication Unit lights there is a problem with
communication between the unit and the external device. There are two ERROR LEDs,
ERR1 and ERR2, for each channel.
CCU
SDRDERRSD RD ERRALARM
CCU
COM.1 COM.2
ERROR LED
Operation of the unit continues even if the ERROR LED lights.
If an error occurs during reception, the frame currently being received is cleared, and the
ERROR LED lights. If the next frame is received normally, however, that frame is
processed as a received frame, and the ERROR LED goes out.
CPU unit operation when the ERROR LED lights
Operation of the CPU unit is not affected.
− In some cases, the contents of the error that occurred may be returned
to the host side, such as a computer or display panel, as an error re-
sponse.
− No response is returned if the transmission speed (baud rate) or char-
acter bit is different between the two devices.
Tip