Chapter 6. Service Request Function278 PACSystems* RX7i, RX3i and RSTi-EP CPU Programmer's Reference Manual GFK-2950C6.2 SVC_REQ 1: Change/Read Constant Sweep TimerUse 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 forthe timer.6.2.1 To disable Constant Sweep mode:Enter SVC_REQ 1 with this parameter block:Address 0Address + 1 Ignored6.2.2 To enable Constant Sweep mode and use the old timer value:Enter SVC_REQ 1 with this parameter block:Address 1Address + 1 0If 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 1Address + 1 New timer valueNote: If the timer value does not already exist, entering 0 causes the function to set the OKoutput to OFF.6.2.4 To change the timer value without changing the selection forsweep mode state:Enter SVC_REQ 1 with this parameter block:Address 2Address + 1 New timer value
