8 May 2001EPICS Group3 Carl Lionberger1 EPICS Support for Group3 Control System Carl Lionberger Group3™ optical-fiber-connected I/O Software and operational experience

8 May 2001EPICS Group3 Carl Lionberger2 Group3 control system VME-Based fiber-optic loop controller –2 loops/VME bd, 8 bds/VME crate –SDLC 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

8 May 2001EPICS Group3 Carl Lionberger3 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)

8 May 2001EPICS Group3 Carl Lionberger4 Group3 controls in a rack

8 May 2001EPICS Group3 Carl Lionberger5 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

8 May 2001EPICS Group3 Carl Lionberger6 CNA Module

8 May 2001EPICS Group3 Carl Lionberger7 Power Supply Control with CNA

8 May 2001EPICS Group3 Carl Lionberger8 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!

8 May 2001EPICS Group3 Carl Lionberger9 CachePolling Loop ~30Hz DI1 DI2 DI3 Loop Controller input PV Output PV Device Support drvG3 Sequence-number concurrency control Per-DI semaphore protected Interrupt IO Scan Queue vxWorks tty driver Group3 EPICS support

8 May 2001EPICS Group3 Carl Lionberger10 Group3 layout screen

8 May 2001EPICS Group3 Carl Lionberger11 Loop Controller Diagnostic

8 May 2001EPICS Group3 Carl Lionberger12 Group3 Diagnostic Port

8 May 2001EPICS Group3 Carl Lionberger13 Dbior report level 3 Scanner has run 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 and Send count Error vector 0x 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: IODef 9 DI 6 Board 1 Type 3 IO Address 0xcc24 updates/sec 28 OK Ints/sec:

8 May 2001EPICS Group3 Carl Lionberger14 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 f c 6f 77 0d 0a 20 6f c 6f 77 0d 0a 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: r mses r tries data buffer 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

8 May 2001EPICS Group3 Carl Lionberger15 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

8 May 2001EPICS Group3 Carl Lionberger16 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

8 May 2001EPICS Group3 Carl Lionberger17 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