Omron SYSDRIVE MX2 SERIES, User Manual

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8 Communications Functions
8 - 10 Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
z Exception code
The inverter will ignore the query and return no response if:
• It receives a broadcast (query with the address set to 0).
• It detects a communications error in receiving a query.
• The slave address specified in a query differs from the inverter’s slave address setting.
• The length of the time interval set for the inverter to receive the next data of the message after
receiving a message is less than 3.5 characters.
• The data length of a query is inappropriate.
• The length of the reception interval in a frame exceeds 1.5 characters.
• The error check code specified in a query does not match (CRC error).
• It receives a simultaneous broadcast by group (query with the address set to 250 to 254).
• Provide a timer on the master side for monitoring the response and set it to resend the same query if
no response is received within the set time.
Code Description
01 hex An unsupported function is specified.
02 hex The specified address does not exist.
03 hex The specified data is in an unacceptable format.
21 hex Writing to a holding register is specified, but the data is out of the range allowed for the inverter.
22 hex
The inverter does not allow this function because:
• Function attempts to change a register that cannot be changed during RUN.
• Function attempts to issue the Enter command during RUN (UV
*1
).
• Function attempts to write data to a register during trip (UV
*1
).
• Function attempts to write data to a register on which the soft lock function is enabled.
• Function attempts to change an I/O terminal that cannot be changed.
• Function attempts to change the contact type of the terminal to which the RS (Reset) is allo-
cated.
• Function attempts to write data to a register when the auto-tuning function is enabled.
• Function attempts to write data to a password-locked register when the password function is
enabled.
etc.
*1. UV: Undervoltage
23 hex
Function attempts to write data to a read-only register (coil).
8-4-5 No Response