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Troubleshooting
1. Error Messages
1.2 MPB Error Messages
When a hardware error or a software error occurs in the MPB, the following messages are highlighted (shown with
reversed background) on the guideline of the lowest line of the screen.
MPB TRAP!!
Contents : Undefined operation code was executed.
Cause :A hardware error occurred.
Action : Replace the MPB.
MPB Receive Error!! (Data Register Full)
Contents :Data receive register is full.
Cause :A hardware error occurred.
Action : Replace the MPB.
MPB Receive Error!! (Over Run Error)
Contents : An overrun occurred while receiving data.
Cause :a.Malfunction occurred due to noise.
b. The cable is broken or disconnected.
c. The connector is not making contact.
Action :1.Separate equipment away from noise source.
2. Replace the MPB cable.
3. Replace the MPB.
MPB Receive Error!! (Parity Error)
Contents :Parity error occurred during communication.
Cause :a.Malfunction occurred due to noise.
b. The cable is broken or disconnected.
c. The connector is not making contact.
Action :1.Separate equipment away from noise source.
2. Replace the MPB cable.
MPB Receive Error!! (Framing Error)
Contents : Framing error occurred during communication.
Cause :Malfunction occurred due to noise.
Action : Separate equipment away from noise source.
MPB Receive Error!! (Buffer Overflow)
Contents : Remaining area in receive buffer fell below 1% during commu-
nications.
Cause :a.Large amount of data was sent from the controller.
b. Communication control error.
Action :1.Replace the MPB.
2. Replace the controller.
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