Rockwell Automation GV3000/SE AC Drive AutoMax Network Communication Board, M/N 2AX3000 - Manual (Page 61)

4-4 AutoMax Network Communication Option Board for the GV3000/SE AC Drive
Alternative Synchronization Methods
The tune/config update synchronization flag applies only to Drop_1. To determine if
the drive received data written to other drops, you must use other methods.
Some alternate methods are:
• Program a delay after writing to the network master’s memory. If you know the
number of drops on the network, and 350 ms is added for processing time at the
drive end, this time is predictable. (See your ReSource AutoMax Programming
Executive instruction manual for information on calculating processing time.) Note
that this method assumes that all requirements have been met for the drive to obtain
its inputs from the network.
• Verify that output register data from the drive matches input data written to the drive.
All parameter data written to the drive can be read back by the master in a different
network register. This is usually the best alternative for full connection
synchronization.
4.4 Monitoring Unacceptable Parameter Values
The parameter processing error status flag (Drop_1, register 14, bit 8) allows the
network master to monitor parameter values that are unacceptable to the drive.
When this flag is set to 1, one or more parameters sent to the drive were rejected.
When this flag is set to 0, all parameters sent to the drive were accepted.
The tune/config inputs enable bit (Drop_1, register 32, bit 14) must be set to 1 before
the drive will read or process any tune/config parameters. The parameter processing
error flag is updated approximately every 350ms.
4.5 Timing Requirements
The transmit time required by the network master to transmit data to the GV3000/SE
drive depends on the number of drops on the network.
Tunable and configurable drive input register values must be maintained by the
network master’s application program for the transmit time plus at least 350ms to
assure that they are read by the drive.
Control/reference data types do not have this 350 ms requirement because they are
read by the drive every 5 to 20ms.
To start the drive, the Start input must be set to 0 for at least 20ms, then set to 1 for at
least 20ms (a 0-to-1 transition). The drive might delay acting on the 0-to-1 transition
for up to 100ms because of variable processing delays. This also allows the drive to
synchronize a drive start to the processing of new configurable data.
To clear the error log, the clear error log bit (Drop_1, register 32, bit 8) must be set to 0
for at least 350ms, then to 1 for at least 350ms (a 0-to-1 transition).
To perform a fault reset, the fault reset bit (Drop_1, register 32, bit 2) must be set to 0
for at least 20ms, then to 1 for at least 20ms (a 0-to-1 transition).