APPENDIX E. COMMUNICATIONS
HF-2500A HIGH FREQUENCY WELD CONTROL
990-371 E-3
For RS-485 communication, do not exceed the capacity of each channel. The product of:
(total number welds per second on all welders on that channel)
times
(total number of bytes exchanged per weld)
times
(8 bits per byte)
must in all cases remain less than the theoretical maximum capacity of the channel – the baud rate selected
on the unit. This capacity is not an issue on RS-232 channels.
A good guideline is that on a line free of electrical noise, the number calculated above must remain less
than 70% of the theoretical maximum capacity. Electrical noise on the communications lines will further
reduce this capacity. Shielded cables are recommended.
Several commands require the unit to be in HOST mode for the unit to accept them. Those commands
include the REPORT command and all SET commands. See the HOST CNTL command in Chapter 3 and
the REMOTE command below for more information.
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