Instruction manual

6. CC-Link COMMUNICATION
IMR01Y06-E6
25
6.3 Processing of Numeric Data Values
Numeric data values used via communication with the PLC and processed by COM-JC include those
with and without decimal points and also those with minus signs.
z 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 extension number 63 (comprehensive event state):
1 (Hexadecimal number: 0001H)
z For numeric data value with decimal point
The decimal point is omitted.
[Example]
When the Measured value (PV) of controller (device address 1) is 120.5 °C
→ Read value of Remote register (RWrn) [Measured value (PV) of device address 1]:
1205 (Hexadecimal number: 04B5H)
→ Read value corresponding to extension number 0 [Measured value (PV)]:
1205 (Hexadecimal number: 04B5H)
z 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]
When the Measured value (PV) of controller (device address 1) is −2.5 °C
→ Read value of Remote register (RWrn) [Measured value (PV) of device address 1]:
Hexadecimal number: FFE7H (10000H − 25 = 10000H − 19H = FFE7H)
→ Read value corresponding to extension number 0 [Measured value (PV)]:
Hexadecimal number: FFE7H (10000H − 25 = 10000H − 19H = FFE7H)
Read data of unused item becomes 0.
Any attempt to write to an unused item is not processed as an error. Data cannot be written
into an unused item.