GE MOTOR MANAGER 2 User Manual

GE Power Management
MM2 Motor Manager 2 6-13
6 COMMUNICATIONS 6.3 ERROR RESPONSES
6
6.3 ERROR RESPONSES 6.3.1 DESCRIPTION
When a MM2 detects an error other than a CRC error, a response will be sent to the master. The
MSBit of the FUNCTION CODE byte will be set to 1 (i.e. the function code sent from the slave will be
equal to the function code sent from the master plus 128). The following byte will be an exception
code indicating the type of error that occurred.
Transmissions received from the master with CRC errors will be ignored by the MM2.
The slave response to an error (other than CRC error) will be:
SLAVE ADDRESS: 1 byte
FUNCTION CODE: 1 byte (with MSbit set to 1)
EXCEPTION CODE: 1 byte
CRC: 2 bytes
The MM2 implements the following exception response codes.
• 01 - ILLEGAL FUNCTION
The function code transmitted is not one of the functions supported by the MM2.
• 02 - ILLEGAL DATA ADDRESS
The address referenced in the data field transmitted by the master is not an allowable address for
the MM2.
• 03 - ILLEGAL DATA VALUE
The value referenced in the data field transmitted by the master is not within range for the
selected data address.

GE MOTOR MANAGER 2 Specifications

General

Brand	GE
Model	MOTOR MANAGER 2
Category	Controller
Language	English