IO-SA0400 Internal I/O Table
| Input | Name of Signal | Output | Name of Signal |
|---|---|---|---|
| Xn.0 | RTD Module Ready | Yn.0 | Reserved |
| Xn.1 | RTD conversion completion flag | Yn.1 | Reserved |
| Xn.2 | Set value saving completion flag | Yn.2 | Requesting to save set value |
| Xn.3 | Reserved | Yn.3 | Reserved |
| Xn.4 | Reserved | Yn.4 | Reserved |
| Xn.5 | Reserved | Yn.5 | Reserved |
| Xn.6 | Reserved | Yn.6 | Reserved |
| Xn.7 | Reserved | Yn.7 | Reserved |
| Xn.8 | Reserved | Yn.8 | Reserved |
| Xn.9 | Reserved | Yn.9 | Reserved |
| Xn.A | Reserved | Yn.A | Reserved |
| Xn.B | Reserved | Yn.B | Reserved |
| Xn.C | Reserved | Yn.C | Reserved |
| Xn.D | Reserved | Yn.D | Reserved |
| Xn.E | Reserved | Yn.E | Requesting circuit calibration |
| Xn.F | RTD Module Error Flag | Yn.F | Requesting to Clear Error Flag |
Input Signal
| Data Register | Signal Name | Description |
|---|---|---|
| Xn.0 | RTD Module Ready | This signal is turned ON at the time RTD conversion is completely ready (CPU power is ON). |
| Xn.1 | RTD 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 RTD conversion enable/disable is changed. – If Set value saving completion flag is OFF, the RTD conversion process is not performed. |
| Xn.F | RTD 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
| Data Register | Signal Name | Description |
|---|---|---|
| Yn.2 | Requesting to save set value | – This signal is turned ON when RTD conversion enable/disable, RTD 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.E | Requesting circuit calibration | – This signal is turned ON when circuit calibration is requested. – 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 RTD module error flag (Xn.F) for timing of ON/OFF. |
Allocation Example
The IO-SA0400 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 IO-SA0400‘s position within the chassis.
To access the X memory registers for this IO-SA0400 example, the X value range is X2.0 ~ X2.F.
To access the Y memory registers for this IO-SA0400 example, the Y value range is Y2.0 ~ Y2.F.