Individual Functions6-105Error CodesThe following table shows MEMOBUS communications error codes.Slave Not RespondingIn the following cases, the slave will ignore the write function. If the slave address specified in the commandmessage is 0, all slaves execute the write function, but do not return response messages to the master.• When a communications error (overrun, framing, parity, or CRC-16) is detected in the command message.• When the slave address in the command message and the slave address in the Inverter do not agree.• When the data that configures the message and the data time length exceeds 24 bits.• When the command message data length is invalid.Application PrecautionsSet a timer in the master to monitor response time from the slaves. Make the setting so that if no response issent to the master from the slave within the set time, the same command message is sent again from the mas-ter.Error Code Contents01H Function code errorA function code other than 03H, 08H, or 10H has been set by the PLC.02HInvalid register number error• The register address you are attempting to access is not recorded anywhere.• With broadcast sending, a start address other than 0000H, 0001H, or 0002H has been set.03HInvalid quantity error• The number of data packets being read or written is outside the range 1 to 16.• In write mode, the number of data packets in the message is not No. of packets x 2.21HData setting error• A simple upper limit or lower limit error has occurred in the control data or when writing con-stants.• When writing constants, the constant setting is invalid.22HWrite mode error• Attempting to write constants from the PLC during operation.• Attempting to write via ENTER commands from the PLC during operation.• Attempting to write constants other than A1-00 to A1-05, E1-03, or 02-04 when warning alarmCPF03 (defective EEPROM) has occurred.• Attempting to write read-only data.23HWriting during main circuit undervoltage (UV) error• Writing constants from the PLC during UV (main circuit undervoltage) alarm.• Writing via ENTER commands from the PLC during UV (main circuit undervoltage) alarm.24H Writing error during constants processingAttempting to write constants from the PLC while processing constants in the Inverter.
