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Chapter 6. Service Request Function
6.2 SVC_REQ 1: Change/Read Constant Sweep Timer
Use SVC_REQ function 1 to:
▪
Disable Constant Sweep mode
▪
Enable Constant Sweep mode and use the old Constant Sweep timer value
▪
Enable Constant Sweep mode and use a new Constant Sweep timer value
▪
Set a new Constant Sweep timer value only
▪
Read Constant Sweep mode state and timer value.
The parameter block has a length of two words used for both input and output.
SVC_REQ executes successfully unless:
▪
A number other than 0, 1, 2, or 3 is entered as the requested operation:
▪
The scan time value is greater than 2550ms (2.55 seconds)
▪
Constant sweep time is enabled with no timer value programmed or with an old value of 0 for
the timer.
6.2.1
To disable Constant Sweep mode:
Enter SVC_REQ 1 with this parameter block:
Address
0
Address + 1 Ignored
6.2.2
To enable Constant Sweep mode and use the old timer value:
Enter SVC_REQ 1 with this parameter block:
Address
1
Address + 1 0
If the timer value does not already exist, entering 0 causes the function to set the OK output to OFF.
6.2.3
To enable Constant Sweep mode and use a new timer value:
Enter SVC_REQ 1 with this parameter block:
Address
1
Address + 1 New timer value
Note:
If the timer value does not already exist, entering 0 causes the function to set the OK
output to OFF.
6.2.4
To change the timer value without changing the selection for
sweep mode state:
Enter SVC_REQ 1 with this parameter block:
Address
2
Address + 1 New timer value
278
PACSystems* RX7i, RX3i and RSTi-EP CPU Programmer's Reference Manual
GFK-2950C
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