CM3 Thermocouple Module Internal I/O Table

CM3-SP04ETO Internal I/O Table

CM3-SP04ETO Internal I/O Signal Table
Direction of Signal CM3-SP04ETO → CPU		Direction of Signal CPU → CM3-SP04ETO
Input	Name of Signal	Output	Name of Signal
Xn.0	TC Module Ready	Yn.0	Reserved
Xn.1	TC conversion completion flag	Yn.1
Xn.2	Set value saving completion flag	Yn.2	Requesting to save set value
Xn.3	Reserved	Yn.3	Reserved
Xn.4		Yn.4
Xn.5		Yn.5
Xn.6		Yn.6
Xn.7		Yn.7
Xn.8		Yn.8
Xn.9		Yn.9
Xn.A		Yn.A
Xn.B		Yn.B
Xn.C		Yn.C
Xn.D		Yn.D
Xn.E		Yn.E
Xn.F	TC Module Error Flag>	Yn.F	Requesting to Clear Error Flag

Input Signal

Input Signal
Data Register	Signal Name	Description
Xn.0	TC Module Ready	This signal is turned ON at the time TC conversion is completely ready (CPU power is ON).
Xn.1	TC conversion completion flag	If any conversion-enabled channel is not converted more than 1 time while the PLC power is ON and its initialization is completed, the flag is OFF. If all conversion-enabled channels finish converting more than one time, the flag is ON. If the set value is changed, this flag is cleared.
Xn.2	Set value saving completion flag	This flag is used for interlocking to turn ON/OFF the Requesting to save set value (Yn.2) data register when TC conversion enable/disable is changed. If Set value saving completion flag is OFF, the TC conversion process is not performed.
Xn.F	TC module error flag	This flag is turned ON when an error occurs in the module. Error code clear turns the Requesting to clear error (Yn.F) data register ON.

Output Signal

Output Signal
Data Register	Signal Name	Description
Yn.2	Requesting to save set value	This signal is turned ON when TC conversion enable/disable, TC set data, and minimum and maximum temperature set value are stored. Refer to Set value saving completion (Xn.2) for timing of ON/OFF.
Yn.F	Requesting to clear error	This signal is turned ON when the error flag, Xn.F, is cleared. Refer to TC module error flag (Xn.F) for timing of ON/OFF.

Allocation Example

The CM3-SP04ETO is allocated one WORD of X (Xn.0 ~ Xn.F) and one WORD of Y (Yn.0 ~ Yn.F).

n is a number representing the CM3-SP04ETO's position within the chassis.

To access the X memory registers for this CM3-SP04ETO example, the X value range is X3.0 ~ X3.F.
To access the Y memory registers for this CM3-SP04ETO example, the Y value range is Y3.0 ~ Y3.F.