Experimental Physics and
Industrial Control System

Hello:

I use sscan Record to drive 2 positioners synchronously.

When the 2 positioners’ scan mode are all TABLE, only positioner 1 can be scanned, it can move position by position as P1PA specified. positioner2 will move to 0, then stop. if I set positioner 2 to LINEAR mode, these 2 can both be scanned, 2 motors can move position by position synchronously.

I have specified P1PA and P2PA by

caput ?a IOC:scan1.P1PA 10 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

caput ?a IOC:scan1.P2PA 10 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

 

Could you tell me why positioner 2 can’t move position by position like position 1 does when both in TABLE mode? Is there any problem with my db file?

 

The db file is like this:

 

record(motor, "$(P)m1"){

    field(SCAN, "Passive")

    field(DESC,"beijing 5phase motor")

    field(DTYP,"OMS MAXv")

    field(DIR,"Pos")

    field(VELO,"10000")

    field(VBAS,"4000")

    field(ACCL,"0.2")

    field(BDST,"0")

    field(OUT,"#C0S0@")

    field(MRES,"8")

    field(PREC,"0")

    field(EGU,"um")

    field(DHLM,"100000")

    field(DLLM,"-100000")

    field(VMAX,"15000")

    field(INIT,"AF")

}

record(motor, "$(P)m2"){

    field(SCAN, "Passive")

    field(DESC,"beijing 5phase motor")

    field(DTYP,"OMS MAXv")

    field(DIR,"Pos")

    field(VELO,"10000")

    field(VBAS,"4000")

    field(ACCL,"0.2")

    field(BDST,"0")

    field(OUT,"#C0S1@")

    field(MRES,"8")

    field(PREC,"0")

    field(EGU,"um")

    field(DHLM,"100000")

    field(DLLM,"-100000")

    field(VMAX,"15000")

    field(INIT,"AF")

}

 

record(sscan, "$(P)scan1") {

  field(DESC, "Scan 1")

  field(PINI, "YES")

  field(PRIO, "HIGH")

  field(MPTS, "10")

  field(FPTS, "FREEZE")

  field(FFO, "USE F-FLAGS")

  field(P1HR, "100000")

  field(P1LR, "0")

  field(P1PR, "0")

  field(P1PV, "$(P)m1.DVAL")

  field(P1SM, "TABLE")

  field(P1AR, "ABSOLUTE")

  field(P1EU, "um")

  field(R1PV, "$(P)m1.DRBV")

  field(P2HR, "100000")

  field(P2LR, "0")

  field(P2PR, "0")

  field(P2PV, "$(P)m2.DVAL")

  field(P2SM, "TABLE")

  field(P2AR, "ABSOLUTE")

  field(P2EU, "um")

  field(R2PV, "$(P)m2.DRBV")

  field(NPTS, "10")

  field(P1SP, "0")

  field(P1SI, "1000")

  field(P2SP, "0")

  field(P2SI, "1000")

  field(PDLY, "0.1")

}

 

likun

Beamline Control Group, SSRF, China

李坤

中国科学院上海应用物理研究所

控制组

电话：021－33933238

email：[email protected]