### MP-111 Host to MP communication error

The MP detected an error during data transmission from the host computer. If the host-to-MP communication link is RS-232, possible errors are:

1. Overrun error,

2. Parity error,

3. Framing error,

4. Overflow of the 256-byte input buffer.

The most probable causes of the first three errors are incompatibilities between the MP and the host in baud rate, character length, parity selection and checking, or number of stop bits.

What you should do

1. To clear the error, power the MP down.

2. On an MP-30 make sure the RS-232 switch settings on the MP control board and quad serial board are correct.

3. On an SMP-400 make sure that the host RS-232 settings agree with the SMP-400 internal switch settings.

4. Power the MP back up.

5. If the error reoccurs, call your Giddings & Lewis service representative.