Love Controller Support
David Kline
April 27, 2005
Argonne National Laboratory
Office of Science
U.S. Department of Energy
A U.S. Department of Energy
Office of Science Laboratory
Operated by The University of Chicago

Contents
•
Overview,
•
Hardware Configurations,
•
Communication protocol,
•
Software Architecture,
• loveApp standalone application,
•
Reporting (dbior),
•
MEDM screens,
•
Distribution,
•
Improvements,
•
Acknowledgements,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
2

Overview
•
Love Controller,
Instrument to measure voltage, current, pressure, or temperature,
Support models 1600 and 16A,
Communication is through 2-wire RS485,
•
Device support,
Part of synApps,
Old support based on MPF,
New support based on Asyn,
The echoServer and devMPC were departure points,
Includes an interpose interface,
Standalone application is available,
IP-Octal RS232 and RS485 modules can be used,
•
Purpose of the new device support,
Use as a learning tool for Asyn-based device support,
Migrate from the unsupported MPF to Asyn,
Appoint one as the owner of the module,
Provide OS independence,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
3

Hardware Configuration – RS232 <-> RS485
SBS XM-Octal-IO
RS232
TD
RD
B&B Electronics
485LDRC
Converter
RS485
A(-)
B(+)
Love
Controller
Model 1600
1
Pioneering
Science and
Technology
Love
Controller
Model 16A
2
Love
Controller
Model 1600 n-1
Asyn-based device support for the Love Controller
Love
Controller
Model 1600 n
Office of Science
U.S. Department of Energy
4

Hardware Configuration – RS485
SBS XM-Octal-IO
A(-)
B(+)
Love
Controller
Model 1600
1
Pioneering
Science and
Technology
Love
Controller
Model 16A
2
Love
Controller
Model 1600 n-1
Asyn-based device support for the Love Controller
Love
Controller
Model 1600 n
Office of Science
U.S. Department of Energy
5

Communication
•
2-wire RS485,
•
Master/slave protocol, command, response messages,
•
Message format (simple),
- Sent and received as ASCII hex,
- Command:
Read: <STX>L<ADDR><CMD><CS><ETX>
Write: <STX>L<ADDR><CMD><VALUE><CS><ETX>
- Response:
Data: <STX>L<ADDR><DATA><CS><ACK>
Error: <STX>L<ADDR>N<CODE><ACK>
•
How does device support know commands?
- INP/OUT fields,
“@asyn(PORT,ADDR) CMD MODEL”,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
6

Software Architecture asynOption asynCommon
AI AO devAsynLove
BI BO interposeLovelink
MBBI asynOctet drvAsynSerialPort interposeEos asynOctetBase asynOctet
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller asyn Port
“S0” asyn Port
“S0”
Office of Science
U.S. Department of Energy
7

loveApp standalone application
•
Sample application,
•
New with the release (R3-0-1),
•
Supports vxWorks and Linux,
•
Database with PVs for each command,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
8

Reporting (dbior)
General
Information
Controller Asyn
Command
Access Asyn PV
Name
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
9

MEDM screens
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
10

Distribution
•
Standard directories,
- Configuration,
Requires Asyn 4-2 and Ipac 2-8,
- Documentation,
Controller and converter Information,
Release notes, known issues,
Wiring diagram,
- Database, record instance files,
- iocBoot for Linux and vxWorks (startup scripts),
- MEDM displays,
•
Contains the sources,
- devAsynLove.c,
- interposeLovelink.c,
- devLove.cc,
- loveServer.cc,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
11

Improvements
•
Current issues,
- Cannot easily debug an individual controller,
- Tight coupling between device support and model type (i.e. INP/OUT),
- Device support controls the command / response processing,
•
Solutions,
- Develop a multidevice driver,
- Employ different approach to reduce coupling,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
12

Improvements – Multidevice port driver
•
Develop a multidevice port driver,
•
Replaces the existing interposeLovelink layer,
•
Placed on top of drvAsynSerialPort,
•
Creates multiple connections to an Asyn port,
•
Allows connections to individual controllers,
•
Monitor individual controller communication,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
13

Improvements – Multidevice port driver
AI AO devLove
BI BO MBBI asynOption
“L0” addr=1 addr=1 addr=3 addr=4 addr=5 asynCommon drvLove asynOctetBase asynOctet asynCommon drvAsynSerialPort interposeEos asynOctetBase asynOctet
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller asyn Port
“L0” asyn Port
“S0”
Office of Science
U.S. Department of Energy
14

Improvements – Different approach
•
Modify the information supplied to INP/OUT,
“@asyn(PORT,ADDR) function”,
•
Employ the drvAsynSerialPort and drvLove drivers,
•
Implement an interface layer to,
- Define a specific interface (i.e. ifaceLove),
- Provide a methods to,
Associate the controller address with a model type,
Read and write a value, setup during record initialization,
- Reduces the need for conditional statements,
- Introducing new model type is cleaner,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
15

Improvements – Different approach, cont… devLove
BI AI AO BO MBBI
“L0” addr=1 addr=1 addr=3 addr=4
Interface Love ifaceLove addr=5 drvLove asynOctetBase asynOctet asynCommon asyn Port
“L0” asyn Port
“L0” asynOption asynCommon drvAsynSerialPort interposeEos asynOctetBase asynOctet asyn Port
“S0”
16
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy

Acknowledgements
•
Marty Kraimer,
•
John Maclean,
•
Ron Sluiter,
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
17

Thank You
EPICS Collaboration
Beamline Controls and Data Acquisition
APS Operations Division
Pioneering
Science and
Technology
Asyn-based device support for the Love Controller
Office of Science
U.S. Department of Energy
18