GFK-0467K Chapter 4 Series 90-30/20/Micro Instructions Set 4-155
4
SVCREQ #14: Clear Fault Tables
Use SVCREQ function #14 in order to clear either the PLC fault table or the I/O fault table. The
SVCREQ output is set ON unless some number other than 0 or 1 is entered as the requested
operation (see below).
For this function, the parameter block has a length of 1 word. It is an input parameter block only.
0 = clear PLC fault table. address
1 = clear I/O fault table.
Example:
In the following example, when input %I0346 is on and input %I0349 is on, the PLC fault table is
cleared. When input %I0347 is on and input %I0349 is on, the I/O fault table is cleared. When
input %I0348 is on and input %I0349 is on, both are cleared.
The parameter block for the PLC fault table is located at %R0500; for the I/O fault table the
parameter block is located at %R0550. Both parameter blocks are set up elsewhere in the program.
| _____
|%I0349 %I0346 | |
|——| |——+——| |——+———————| SVC_|—
| | | | |
| | | | REQ |
| |%I0348 | | |
| +——| |——+CONST —|FNC |
| 0014 | |
| | |
| %R0500 —|PARM |
| |_____|
|
| _____
|%I0349 %I0347 | |
|——| |——+——| |——+———————| SVC_|-
| | | | |
| | | | REQ |
| |%I0348 | | |
| +——| |——+CONST -|FNC |
| 0014 | |
| | |
| %R0550 -|PARM |
| |_____|
|