6. PROFIBUS COMMUNICATION
IMR01Y35-E3
27
6.3 Processing of Numeric Data Values
Numeric data values used via communication with the PLC and processed by COM-JG include those
with and without decimal points and also those with minus signs.
For numeric data value without decimal point
If there is no decimal point, the value is processed as it is.
In parameters which only have ON or OFF status, 1
=
ON, 0
=
OFF.
[Example]
A signal wire for temperature input is disconnected and the burnout state occurs.
→
Read value corresponding to communication item address 0021 (Burnout state monitor):
1 (Hexadecimal number: 0001H)
For numeric data value with decimal point
The decimal point is omitted.
[Example 1]
When temperature measured value of controller is 120.5
°
C
→
Read value corresponding to communication item address 0000 [Measured value (PV)]:
1205 (Hexadecimal number: 04B5H)
[Example 2]
When temperature measured value of controller is 130
°
C
→
Read value corresponding to communication item address 0000 [Measured value (PV)]:
130 (Hexadecimal number: 0082H)
For numeric data value with minus sign
The value is expressed as a 2’s complement value which is obtained by subtracting the minus value
from the hexadecimal number 10000H.
[Example 1]
When temperature measured value of controller is
−
1
°
C
→
Read value corresponding to communication item address 0000 [Measured value (PV)]:
Hexadecimal number: FFFFH
(10000H
−
1 = FFFFH)
[Example 2]
When temperature measured value of controller is
−
2.5
°
C
→
Read value corresponding to communication item address 0000 [Measured value (PV)]:
Hexadecimal number: FFE7H
(10000H
−
25 = 10000H
−
19H = FFE7H)
The original minus value can be found by revising the WORD value to the INT value on the
sequence program side.
Содержание COM-JG
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