Data Format - Fuji Electric PXG-9 Communication Instruction Manual

Data Format

Sent Data Format
The MODBUS protocol used by this equipment employs RTU (Remote Terminal Unit) mode. The data is sent as "numerical
value", not as ASCII code.
Internal Calculation Value and Engineering Unit
In this unit, parameter data and data dependent on an input range can handle the following two types of data.
Internal Calculation Value: Values listed as percentages of the input range (0.00 to 100.00, without decimal point)
Engineering Unit: Values subjected to scaling to actual values depending on the input range
"Engineering Unit" data is handled as the address (resister number) of 1000 added to the address (resister number) for "Internal
Calculation Value".
(Ex.) The value is calculated as follows when the full scale is 400°C and the PV value is "150".
Class
Internal Calculation Value
Engineering unit
The PV value is received as follows.
Chapter 37.50 (%) x 400 (full scale °C) = 150 °C
7
Data not dependent on an input range the same data in both addresses.
Also, bit data cannot be handled in this manner. (Not effective for addresses with 1,000 added.)
Refer to
For more about data dependent on an input range, see
"Chapter 7 Address Map and Data Format" (page xx).
Pay attention to the position of the decimal point when changing the input range by writing with communication. When
Caution
changing the position of the decimal point by writing with communication, change the lower limit and upper limit of the
input range at the same time.
(Ex.) When changing the input range from 0 to 400 to 0.0 to 400.0
■ Operating the keys on the front of the equipment
Change the position of the decimal point ("P P P P v v v v d d d d ") in the setup menu ("S S S S E E E E T T T T C C C C h h h h 6 6 6 6 ").
"P P P P v v v v d d d d " = 0 → 1 (or 2)
■ Changing by communication
Set the decimal position parameter ("P P P P v v v v d d d d "), as well as the corresponding values for PF input lower limit ("P P P P v v v v b b b b ") and PV input
upper limit ("P P P P v v v v F F F F ").
"P P P P v v v v d d d d " = 0 → 1
"P P P P v v v v b b b b " = 0 → 0
"P P P P v v v v F F F F " = 400 → 400
Managing the Decimal Point
Some of the internally stored data may contain may digits lower than the decimal point on the front display. Also, the decimal point
is not added to sent data.
Carry out processes for the decimal point position (erasing the decimal point when sending data and adding the decimal point
when receiving data).
Attention must be paid to the position of the decimal point for data where the parameters are dependent on a range in "Chapter 7
Address Map and Data Format". Refer to Address Map.
Resistor Number Data (HEX)
30001 0EA6 (H)
31001 0096 (H)
Data
→
3750 (37.5%)
150
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