GFK-2950C February 2018 275Chapter 6 Service Request FunctionUse a Service Request function to request one of the following control system services:SVC_REQ 1: Change/Read Constant Sweep TimerSVC_REQ 2: Read Window Modes and Time ValuesSVC_REQ 3: Change Controller Communications Window ModeSVC_REQ 4: Change Backplane Communications Window Mode and Timer ValueSVC_REQ 5: Change Background Task Window Mode and Timer ValueSVC_REQ 6: Change/Read Number of Words to ChecksumSVC_REQ 7: Read or Change the Time-of-Day ClockSVC_REQ 8: Reset Watchdog TimerSVC_REQ 9: Read Sweep Time from Beginning of SweepSVC_REQ 10: Read Target NameSVC_REQ 11: Read Controller IDSVC_REQ 12: Read Controller Run StateSVC_REQ 13: Shut Down (STOP) CPUSVC_REQ 14: Clear Controller or I/O Fault TableSVC_REQ 15: Read Last-Logged Fault Table EntrySVC_REQ 16: Read Elapsed Time ClockSVC_REQ 17: Mask/Unmask I/O InterruptSVC_REQ 18: Read I/O Forced StatusSVC_REQ 19: Set Run Enable/DisableSVC_REQ 20: Read Fault TablesSVC_REQ 21: User-Defined Fault LoggingSVC_REQ 22: Mask/Unmask Timed InterruptsSVC_REQ 23: Read Master ChecksumSVC_REQ 24: Reset ModuleSVC_REQ 25: Disable/Enable EXE Block and Standalone C Program ChecksumsSVC_REQ 29: Read Elapsed Power Down TimeSVC_REQ 32: Suspend/Resume I/O InterruptSVC_REQ 45: Skip Next I/O ScanSVC_REQ 50: Read Elapsed Time ClockSVC_REQ 51: Read Sweep Time from Beginning of SweepSVC_REQ 56: Logic Driven Read of Nonvolatile StorageSVC_REQ 57: Logic Driven Write to Nonvolatile StorageThe following Service Requests are used in CPU HSB redundancy applications.Refer to the PACSystems Hot Standby CPU Redundancy User’s Guide, GFK-2308. For non-HSB applications,refer to PACSystems RX7i, RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual, GFK-2224.SVC_REQ 26 Role switch (redundancy)SVC_REQ 27 Write to reverse transfer area (Hot Standby Redundancy)SVC_REQ 28 Read from reverse transfer area (Hot Standby Redundancy)SVC_REQ 43 Disable data transfer copy in backup unit (Hot Standby Redundancy)SVC_REQ 55 Set application redundancy mode (non-Hot Standby Redundancy)
