GE 90-30/20/Micro manual Svcreq #1 Change/Read Constant Sweep Timer, ∙ Disable Constant Sweep mode

4

SVCREQ #1: Change/Read Constant Sweep Timer

Beginning with 90-30 CPU Release 8, use SVCREQ function #1 to:

∙Disable CONSTANT SWEEP mode.

∙Enable CONSTANT SWEEP mode and use the old timer value.

∙Enable CONSTANT SWEEP mode and use a new timer value.

∙Set a new timer value only.

∙Read CONSTANT SWEEP mode state and timer value.

Note

Of the CPUs discussed in this manual, Service Request 1 is supported only by 90-30 CPUs, beginning with Release 8.0.

The parameter block has a length of two words.

To disable CONSTANT SWEEP mode, enter SVCREQ function #1 with this parameter block:

0

ignored

address

address + 1

To enable CONSTANT SWEEP mode, enter SVCREQ function #1 with this parameter block:

1

0 or timer value

address

address + 1

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 will cause the function to set the OK output to OFF.

To change the timer value without changing the selection for sweep mode state, enter SVCREQ function #1 with this parameter block:

2

new timer value

address

address + 1

To read the current timer state and value without changing either, enter SVCREQ function #1 with this parameter block:

3

ignored

address

address + 1

4-134 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K