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Understanding the Features
Setpoint data is continually and transparently written to the associated PLC
register(s). To access and use the setpoint data, reference the relevant PLC
register(s) (M+0 through M+11) in your PLC program.
When a value is written to a PLC register (M+0 through M+11) designated as display
data, the OP--414 automatically retrieves and displays the data.
NOTE:
The OP--414 can read and write setpoint data, but can only read display
data.
There are times when it is necessary for the PLC program to initialize or override a
setpoint. The capability to do so is provided as the Force Setpoint function.
To force a setpoint to a given value, place the value in register M+12 (and M+13 for
BCD long numbers). Next, set the bit(s) FP1--FP6 found in register M+14
corresponding to the setpoint(s) to be forced and set the FSP bit. Once the OP--414
has forced the setpoint(s) to the required value, it will clear registers M+12, M+13
and M+14.
NOTE: If the Force Setpoint option is not selected in the OP--WINEDIT
configuration software, then setpoints cannot be forced and registers M+12,
M+13 and M+14 cannot be used.
Numeric Data Types
There are two types of data that the OP--414 can display: BCD long (also known as
BCD double) and Binary.
BCD long (or BCD double) data has a value range of 0--99999999.
To display a BCD long number, place the least significant four digits of the number
into the field point data cell. Next, place the most significant four digits into the field
point data cell 2.
To read a setpoint BCD long value, the OP--414 continuously places the least
significant four digits into the corresponding field point data cell and the most
significant four digits into the corresponding field point data cell 2. Simply reference
both registers in your PLC program to display the value.
For example, if the displayed value or the setpoint value is 92345678, then the PLC
register will display the following (shown in BCD/Hex format):
BCD Long Data
PLC Register
Field point data cell
5678
Field point data cell 2
9234
Reading or Writing
a Setpoint
Reading a Display
Point
Forcing a Setpoint
BCD Long Data
