MMI Product Documentation
The operation of a limit statement after the following OPCODEs is described in more detail below:
E (EVENT) (INPUT) | - A limit statement here will |
| cause the program to wait |
| for the specified event |
| INPUT (normally event |
| numbers |
| the specified state (ON OR |
| OFF, 1 OR 0), before |
| proceeding. If this does not |
| occur within the specified |
| limit time, a limit |
| alarm will occur. |
| Note: The event INPUT must be |
| held in the trip state for at least 30 |
| seconds to make sure that the |
| Programmer will acknowledge it. |
| Thus, a momentary push button |
| could not be used as an event |
| INPUT unless some type of |
| latching scheme is employed. |
| If a limit statement is not used, the |
| program may wait indefinitely. |
Unipro 3.5 Process Control | 1 Aug. 1997 |
