|
<< Click to Display Table of Contents >>
Reading a PLC Status Word |
Used to check the last value of a PLC Status Word returned by a device, via script of an OnRead event of a Tag Block reading, according to the parameters described on the next table.
B1 |
Not used |
B2 |
999 |
B3 |
Not used |
B4 |
Not used |
Each OnRead event returns a Block with the structure of Elements on the next table to interpret the last received PLC Status Word.
Available Elements on PLC Status Word Tag
Element |
Description |
Value |
|---|---|---|
1 |
Oversweep flag. Meaningful only when constant sweep mode is active |
0: There is no oversweep condition or 1: Constant sweep value exceeded |
2 |
Constant sweep mode |
0: Constant sweep mode deactivated or 1: Constant sweep mode activated |
3 |
PLC Fault Entry since last reading |
0: PLC fault table unchanged since last reading or 1: PLC fault table was changed since last reading by this device |
4 |
PLC I/O Fault Entry since last reading |
0: PLC's I/O fault table unchanged since last reading or 1: PLC's I/O fault table was changed since last reading by this device |
5 |
PLC Fault Entry available |
0: PLC fault table is empty or 1: One or more fault entries in PLC fault table |
6 |
PLC I/O Fault Entry available |
0: PLC's I/O fault table is empty or 1: One or more fault entries on PLC's I/O fault table |
7 |
Programmer attachment flag |
0: No programmer attachment found or 1: Programmer attachment found |
8 |
Enables or disables front panel switch configuration |
0: Outputs enabled or 1: Outputs disabled |
9 |
Runs or stops front panel switch configuration |
0: Stop or 1: Run |
10 |
Protected OEM |
0: No OEM protection or 1: OEM protection in effect |
11 |
Not used |
0 (zero) |
12 |
Not used |
0 (zero) |
13 |
PLC status |
0: Run I/O enabled, 1: Run I/O disabled, 2: Stop I/O disabled, 3: CPU stopped by failure, 4: CPU stopped, 5: CPU suspended, or 6: Stop I/O enabled |