3. SPECIFICATIONS
MELSEC-A
3-14
Device No.
Signal name
Description
RY (n+1) 0
to
RY (n+1) 6
CH.1
thermocouple
selection flag
RY (n+1) 8
to
RY (n+1) E
CH.2
thermocouple
selection flag
RY (n+2) 0
to
RY (n+2) 6
CH.3
thermocouple
selection flag
RY (n+2) 8
to
RY (n+2) E
CH.4
thermocouple
selection flag
RY (n+3) 0
to
RY (n+3) 6
CH.5
thermocouple
selection flag
RY (n+3) 8
to
RY (n+3) E
CH.6
thermocouple
selection flag
RY (n+4) 0
to
RY (n+4) 6
CH.7
thermocouple
selection flag
RY (n+4) 8
to
RY (n+4) E
CH.8
thermocouple
selection flag
All CH.
batch
thermocouple
selection flag
All channels are selected to the same thermocouple in batch. This flag takes priority
over the thermocouple selection flag for individual channels. The thermocouple
selection flag for individual channels may only be used when this flag is off.
Also, when multiple batch thermocouple selection flags are turned on, the write data
error flag is turned on and the previously selected thermocouple type is retained.
Refer to the I/O signal list for the correspondence between each signal and
thermocouple type.
Note : This flag is only valid when the initial data processing compensation flag
(RY(n+7)8) or initial data setting request flag (RY (n+7) 9) is on.
RY (n+5) 7
The detected temperature value to be stored in the remote register can be selected
from a value that has undergone cold junction compensation by Pt100 temperature-
measuring resistor, and a value that has not (the cold junction compensation is
performed externally).
ON : Cold contact compensation is not performed by the Pt100 temperature-
measuring resistor.
OFF : Cold contact compensation is performed by the Pt100 temperature-measuring
resistor.
Note : This flag is only valid when the initial data processing compensation flag
(RY(n+7)8) or initial data setting request flag (RY (n+7) 9) is on.
Selects the type of thermocouple to be connected to each channel.
Only the flags appropriate for the thermocouple to be used are turned on.
It is read as the set value when the initial data processing request flag is turned on.
When the flag is off after power on or a hardware reset, the K type is selected.
Also, when multiple thermocouple selection flags are turned on, the write data error flag
is turned on and the previously selected thermocouple type is retained.
Refer to the I/O signal list for the correspondence between each signal and
thermocouple type.
Note : This flag is only valid when the initial data processing compensation flag
(RY(n+7)8) or initial data setting request flag (RY (n+7) 9) is on.
RY (n+5) 0
to
RY (n+5) 6
Pt100 cold
junction
compensation
disable flag
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