GE VersaMax PLC, User Manual

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11.3 SVCREQ 1: Change/Read Constant Sweep Timer
Use SVCREQ 1 to enable or disable Constant Sweep Time mode, change the length of
the Constant Sweep Time, read whether Constant Sweep Time is currently enabled, or
read the Constant Sweep Time length.
11.3.1 Input Parameter Block for SCVREQ 1
For this function, the parameter block has a length of two words.
11.3.1.1 Disable Constant Sweep Mode
To disable Constant Sweep mode, enter SVCREQ function #1 with this parameter block:
address 0
a 1
ignored
11.3.1.2 Enable Constant Sweep Mode
To enable Constant Sweep mode, enter SVCREQ function #1 with this parameter block:
address 1
a 1 0 or timer value
Note
If the timer should use a new value, enter it in the second word. If the timer value
should not be changed, enter 0 in the second word. If the timer value does not already
exist, entering 0 causes the function to set the OK output to OFF.
11.3.1.3 Change the Constant Sweep Time
To change the timer value
without
changing the selection for sweep mode state, enter
SVCREQ function #1 with this parameter block:
address 2
a 1 new timer value
11.3.1.4 Read the Constant Sweep State and Time
To read the current timer state and value without changing either, enter SVCREQ function
#1 with this parameter block:
address 3
a 1
ignored
Successful execution will occur, unless:
1. A number other than 0, 1, 2, or 3 is entered as the requested operation.
2. The sweep time value is greater than 500ms (0.5 seconds).
3.
Constant sweep time is enabled with no timer value programmed or with an old value
of 0 for the timer.
198 GFK-1503E VersaMax PLC User Manual
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