Maple Systems OIT Family - Manual (Page 55)

PLC Register contains: +214,100.45
Decimal Location: 5 ( 21,474.83647 to + 21,474.83647)
OIT Displays: ########
If a value is within the specified range, but has a greater precision, then the OIT will
truncate the number to the precision of the specified range. See Example 2.
Example 2, Out Of Range Precision
PLC Register contains: +350.128 (3 decimal places)
Decimal Location: 2 ( - 21,474.836.47 to + 21,474.836.47)
OIT Displays: +350.12 (displayed to 2 decimal places).
Note that the value displayed by the OIT is truncated, not rounded.
Word Order
If you are using one of the following PLC communications drivers, you have the option
of selecting how the OIT interprets the word order when reading or writing to two
consecutive 16-bit PLC registers using the Floating Point format:
• Emerson Motion Control - Modbus
• Entertron Industries -- Modbus
• Industrial Control Links - Modbus
• Modbus Generic Network
• Modicon
• SAF Drives - Modbus
• Sixnet -- Modbus
To change the word order, from the Configuration Menu select Controller Settings and
then in the Floating Pt. box select Low Word First or High Word First. When set to Low
Word First, the default setting, the OIT considers the first PLC register as the least
significant word and the second PLC register as the most significant word. When set to
High Word First the OIT regards the first PLC register as the most significant word and
the second PLC register as the least significant word.
PLC Register Monitor Attributes
Number of Digits
This attribute allows you to configure the number of character positions that the PLC
Register Monitor occupies in the screen. If the data read from the PLC register requires
more space than has been allocated, the overload character “#” appears in each character
position of the PLC Register Monitor until a number within range is read.
Some of the other attributes (such as Decimal Location and Commas) increase the
number of character positions that the PLC Register Monitor occupies in the screen.
To configure the Number of Digits in a PLC Register Monitor:
1. In the Register Monitor Editor dialog box, in the Attributes group box, in the Number
of Digits scroll box, select the required length.
PLC Register Monitors 55
1010-0099, Rev. 07