MCT-MC
4.3
FDC MCT-MC
- 162 -
Appendix
A.1.10.3 Starting an Automatic Program
Automatic programs are sent to the MC in a step-by-step process. The download sequence must be followed
in proper order and must complete without errors to be valid. If a write error is detected during the transfer of
a program from a PC to the MC (no response from MC or NACK returned), the program download must be
aborted and restarted.
The MC is automatically placed into program transfer mode when the header step of a program is first sent
(registers 86-90). The MC then begins looking for the following program steps to be sent. Once the MC detects
the end step, it then downloads the program to the loop control assigned to the Modbus address that the
program steps were written to.
If an error occurs during the transfer process from the PC to the MC, the program transfer process should be
stopped at the PC. The data sent to the MC was either corrupted in transmission or not received properly. It
is not possible to resend the failed step because it is not known if any of the previous data was received by the
MC properly. On the transmission error, the MC will enter a 20 second timeout process. At the end of the
timeout period, the buffer will be cleared and the program can be resent. In order to insure that the new
download begins properly, induce a 20 second wait period on the host PC after the failed transmission attempt
to insure that enough time has elapsed.
Summary of Contents for MCT-MC 4.3
Page 1: ...MCT MC 4 3 User Manual MCT MC 4 3 User Manual Rev A February 2018...
Page 176: ...MCT MC4 3 FDC MCT MC 176 Appendix...
Page 177: ...MCT MC4 3 Appendix 177 FDC MCT MC Open Frame Power Supply Specifications...
Page 178: ...MCT MC4 3 FDC MCT MC 178 Appendix...
Page 179: ...MCT MC4 3 Appendix 179 FDC MCT MC A 6 Power On Delay Relay Specifications GE1A C10HA110...
Page 180: ...MCT MC4 3 FDC MCT MC 180 Appendix...
