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Chapter 4
Configuration Output Table Overview
To configure the module, you send commands via the PLC output table.
The 1756 module uses 32 16-bit INT words in and out. Only 5 words of the output table
are normally used. (Command 0X5E uses ten and 0X5F uses seven)
Parameters can be read (READPARAM) or written (WRITEPARAM) one at a time:
To read a parameter, put the readparam command number in word 0, the format
word in word 1, and the parameter’s number in word 2 of the output table.
To write a parameter, put the writeparam command number in word 0, the
format word in word 1, and the parameter’s value in words 3 and 4 of the output
table.
First Word - 0: Command Number
The first word in the output table is a command. The possible commands are:
Word
Command structure write
0 Command
number
1
Format word (see Format Word below)
2 Value
(LSW)
3
Value (MSW)
4 Parameter
ID
Command
# Hex Description
NOCMD
0
No command
STARTCMD
1 START
STOPCMD
2 STOP
REFILLCMD
3 REFILL
WRITENONVOLATILE
4
Saves all parameters (including calibration
constants) to the non-volatile memory. Error Return
Values: None
MANUALCMD
5 Enters manual mode
ABORTCMD
6 Stop,
go straight to IDLE mode
CLEARALARMS
0x7
Clear all alarms from the rate status word
RELOADNONVOLATILE
0x10
Causes the weigh module to re-read the values
stored in its non-volatile memory. Parameters
changed since the last write non-volatile command
are overwritten. Can be used to abort a calibration
or parameter entry session. No error return values.
RATE_CAL_5_POINTS_
DEFINED
0x5E
Runs the 5-point rate calibration at percentage
outputs defined at words 2-6. The percentages have
0 decimal places. They must be > 0, < 100, and in
ascending order, with a minimum of 10 between
them.
RATE_CAL_2_POINTS_
DEFINED
0x5F
Runs the 2-point rate calibration at percentage
outputs defined at words 2-3. The percentages have
0 decimal places, and must be > 0, < 100, and in
ascending order, with a minimum of 10 between
