USER MANUAL User guide

Publication 2706-6.3
If the DL40 Plus Slave and host are not set to the same serial port
settings, a reception error occurs. The error symbol is a ! displayed as
the last character on line 1. This symbol is displayed for 1/5 sec (200
msec) after each serial error.
Note: Data cannot be displayed when a serial port error occurs.
DIAG: 19200 N-8-1 !
05 01 0D
Serial Port Error