Keithley 6485 Instruction Manual page 12

RS-232 interface reference ....................................................... 9-16
Sending and receiving data ................................................ 9-16
RS-232 settings ................................................................. 9-16
Baud rate .................................................................... 9-17
Data and stop bits ....................................................... 9-17
Parity .......................................................................... 9-17
Terminator .................................................................. 9-17
Flow control (signal handshaking) ............................. 9-17
RS-232 connections ........................................................... 9-18
Error messages .................................................................. 9-19
10 Status Structure
Overview .................................................................................. 10-2
Clearing registers and queues ................................................... 10-4
Programming and reading registers .......................................... 10-5
Programming enable registers ........................................... 10-5
Reading registers ............................................................... 10-6
Status byte and service request (SRQ) ..................................... 10-7
Status byte register ............................................................ 10-8
Service request enable register .......................................... 10-8
Serial polling and SRQ ...................................................... 10-9
SPE, SPD (serial polling) ........................................... 10-9
Status byte and service request commands ....................... 10-9
Programming example - set MSS (B6)
when error occurs ..................................................... 10-10
Status register sets .................................................................. 10-10
Register bit descriptions .................................................. 10-10
Standard event status ................................................ 10-10
Operation event status .............................................. 10-12
Measurement event status ........................................ 10-13
Questionable event status ......................................... 10-15
Condition registers ................................................... 10-15
Event registers .......................................................... 10-16
Event enable registers ............................................... 10-17
Programming example - program and
read registers ............................................................ 10-18
Queues .................................................................................... 10-18
Output queue ................................................................... 10-18
Error queue ...................................................................... 10-18
Programming example - read error queue ............. 10-20
11 Common Commands
Common Commands ................................................................ 11-2