PROGRAMMING MODULE #7 - PROGRAM SERIAL COMMUNICATIONS
Several programmable parameters must be programmed before serial
communication can occur.
BAUD RATE
Select one of the baud rates from the list to match the baud rate of the printer,
computer, controller, etc.
“bAud” < > “300” - 300 baud
“600” - 600 baud
“1200” - 1200 baud
“2400” - 2400 baud
UNIT ADDRESS NUMBER
To allow multiple units to communicate on the 20 mA loop, different address
numbers must be assigned to each unit. If only one unit is on the loop, an address
of “0” may be given, eliminating the need for the address command.
“AddrES” < > “0” to “99”
PRINT REQUEST FUNCTION
A selection of print operations can be programmed. A print operation occurs
when a print request is activated via E1-CON (TBA #4, ) or optional E2-CON
(TBA #8) pin, or a “P” command is sent from a terminal via the serial
communications option. If the option to which a particular print code applies is
not installed, then that parameter will not be printed.
If the totalizer is overflowed, an asterisk (*) will precede the digits that are
printed (ex. *000127 positive overflow, -*00127 negative overflow). If the input
is overloaded the print-out will be “OLOLOL” and for underload “ULULUL”.
“Print” < > “0” - input signal
“1” - input signal, peak, valley and tare
“2” - input signal, alarm 1, and alarm 2
“3” - input signal, alarm 1, alarm 2,
hysteresis 1, hysteresis 2, peak, valley, and tare
“4” - totalizer
“5” - input signal and totalizer
“6” - input signal, totalizer, peak, valley, and tare
“7” - totalizer, alarm 1, and alarm 2
“8” - input signal, totalizer, alarm 1, and alarm 2
“9” - input signal, totalizer, alarm 1, alarm 2, hysteresis 1,
hysteresis 2, peak, valley, and tare
FULL OR ABBREVIATED TRANSMISSION
When transmitting data, the IMP can be programmed to suppress the address
number, mnemonics and some spaces, if desired by selecting “NO”. A selection
of “NO” results in faster transmission. This feature may be helpful when
interfacing with a computer. When interfacing to a printer, a “yES” response is
usually desirable.
“FULL” < > “yES” or “NO”
An example of full and abbreviated transmission is shown below:
2 INP -125.75 < CR><LF> Full transmission
-125.75 < CR><LF> Abbreviated transmission
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