GE 90-30/20/Micro manual Disable Constant Sweep mode Enable Constant Sweep mode

4

Note

After using SVCREQ function #1 with the parameter block on the previous page, Release 8 and higher CPUs will provide the return values 0 for Normal Sweep, 1 for Constant Sweep. Do not confuse this with the input values shown below.

Successful execution will occur, unless:

1. A number other than 0, 1, 2, or 3 is entered as the requested operation:

0Disable CONSTANT SWEEP mode.

1Enable CONSTANT SWEEP mode.

2Set a new timer value only.

3Read CONSTANT SWEEP mode and timer value. (See Note above).

2. The time value is greater than 2550 ms (2.55 seconds).

3. Constant sweep time is enabled with no timer value programmed, or with an old value of 0 for the timer.

After the function executes, the function returns the timer state and value in the same parameter block references:

0 = disabled

1 = enabled

current timer value

address

address + 1

If word address + 1 contains the hexadecimal value FFFF, no timer value has ever been programmed.

GFK-0467K Chapter 4 Series 90-30/20/Micro Instructions Set 4-135