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EPICS Support for Group3 Control System

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EPICS Support for Group3 Control System

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  1. EPICS Support for Group3 Control System Carl Lionberger Group3™ optical-fiber-connected I/O Software and operational experience EPICS Group3 Carl Lionberger

  2. Group3 control system • VME-Based fiber-optic loop controller • 2 loops/VME bd, 8 bds/VME crate • SDLC 1.152 Mbaud on loop • 16 DI’s (Device Interface) / loop • CNA – 2 AI, 1 AO, 8BI, 8BO • Has PID (not supported) • CN3 – CPU + 3 I/O boards • digital I/O, analog I/O, motor control • Serial, gpib (not supported) • Diagnostic Port on each DI EPICS Group3 Carl Lionberger

  3. Optical Fiber Items • HP HFBR Versatile Link • 40 meters max/link plastic, 3 km max/link glass • Plastic easy to terminate in-house • Glass & SMA connectors by special order • Have had bad experience with passive cable extenders (barrel connectors, feed-throughs) EPICS Group3 Carl Lionberger

  4. Group3 controls in a rack EPICS Group3 Carl Lionberger

  5. Group3 EPICS support • CNA combination module • Ai, ao, bi, bo, mbbi, mbbiD, mbbo, mbboD • B digital module • bi, bo, mbbi, mbbiD, mbbo, mbboD • C 8 16-bit analog input – ai • D 8 12-bit analog output – ao • E 4-channel DC motor controller • Mbbo for mode, ao for speed, accel • G 4-channel stepper – steppermotor record • H 4-channel encoder – ai, steppermotor record • F dual-serial, diagnostic port – vxWorks tty driver • Loop Controller (status) – ai, mbbi, mbbiD EPICS Group3 Carl Lionberger

  6. CNA Module EPICS Group3 Carl Lionberger

  7. Power Supply Control with CNA EPICS Group3 Carl Lionberger

  8. Directly connected CNAs • 2 CNA’s connected directly to each other by two fiber cables • Output of each one reflects corresponding inputs of other • Nice for remote power switches and resets • No Software! EPICS Group3 Carl Lionberger

  9. Group3 EPICS support Loop Controller DI1 input PV drvG3 Cache Polling DI2 Loop ~30Hz Output PV DI3 Per-DI semaphore protected Sequence-number Device Support concurrency control Interrupt vxWorks IO Scan tty driver Queue EPICS Group3 Carl Lionberger

  10. Group3 layout screen EPICS Group3 Carl Lionberger

  11. Loop Controller Diagnostic EPICS Group3 Carl Lionberger

  12. Group3 Diagnostic Port EPICS Group3 Carl Lionberger

  13. Scanner has run 13221688 times. Loop Controller 12 in use at 0xffffc000 with status 0x0 Extended error: 0x1 error count: 3477 DI online bits: 0x7f IO Buffer memory 34 percent used; 14 of 60 iodefs used. Receive count 288247461 and Send count 292452437 Error vector 0x1000000 DI vector 0x0 IO vector 0x0 SDLC 0x84 Error vector bits: Bad SDLC Packet Active nodes: IODef 0 DI 0 Board 0 Type 6 IO Address 0xcf80 updates/sec 0 OK vxWorks tty name: LEBT:Extr receive index 0 IODef 8 DI 3 Board 1 Type 101 IO Address 0xcc48 updates/sec 1 OK Ints/sec: 1 0 0 IODef 9 DI 6 Board 1 Type 3 IO Address 0xcc24 updates/sec 28 OK Ints/sec: 0 0 0 0 0 0 0 0 Dbior report level 3 EPICS Group3 Carl Lionberger

  14. Dbior report level 4 IODef 3 DI 3 Board 0 Type 6 IO Address 0xce00 updates/sec 0 OK vxWorks tty name: LEBT:Chop_P receive index 0 r mses r tries data buffer 136003 0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 75 66 66 65 72 20 6f 76 65 72 66 6c 6f 77 0d 0a 20 6f 76 65 72 66 6c 6f 77 0d 0a 20 20 IODef at 0xffffc070 DI 0x3 Bd 0x0 Type 0x6 offset 0xe00 IODef 9 DI 6 Board 1 Type 3 IO Address 0xcc24 updates/sec 20 OK Ints/sec: 0 0 0 0 0 0 0 0 r mses r tries data buffer 265969 0 01 00 03 00 02 00 02 00 02 00 01 00 03 00 03 00 IODef at 0xffffc0d0 DI 0x6 Bd 0x1 Type 0x3 offset 0xc24 IODef 10 DI 0 Board 1 Type 101 IO Address 0xcbdc updates/sec 7 OK Ints/sec: 5 2 0 EPICS Group3 Carl Lionberger

  15. Sparks Can Still Get In • Power (24V AC/DC) • Isolation transformer types • Routing of 110 V • Signals • RC networks in CN3, CNA connector blocks • Grounding and shielding • VME crates • Overall grounding and power quality EPICS Group3 Carl Lionberger

  16. General Problems • No readback of outputs through normal channels. • Could startup with diagnostic ports only to obtain initial readback value for glitchless performance. • Rewrite driver • CN3 board addressing flaw • Don’t use multiple boards of same type in same CN3! • Firmware fix in the works? • Addresses not reconfigurable on the fly • Diagnostic port-level automatic configuration support inadequate EPICS Group3 Carl Lionberger

  17. Conclusions • Easy to set up and use • Runs reliably under reasonable conditions • Optical fiber communication link does not solve all electrical isolation problems • There are still some possible driver level issues EPICS Group3 Carl Lionberger