Fluke 271-U 115V Product Manual - Page 96

GPIB Interface

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271 Users Manual Full List of Addressable RS232 Interface Control Codes 02H Set Addressable Mode. 03H Universal Unaddress control code. 04H Lock Non-Addressable mode control code. 06H Acknowledge that listen address received. 0AH Line Feed (LF); used as the universal command and response terminator. 0DH Carriage Return (CR); formatting code, otherwise ignored. 11H Restart transmission (XON). 12H Listen Address − must be followed by an address belonging to the required instrument. 13H Stop transmission (XOFF). 14H Talk Address − must be followed by an address belonging to the required instrument. 18H Universal Device Clear. GPIB Interface The 24−way GPIB connector is located on the instrument rear panel. The pin connections are as specified in IEEE Std. 488.1−1987 and the instrument complies with IEEE Std. 488.1−1987 and IEEE Std. 488.2−1987. GPIB Subsets This instrument contains the following IEEE 488.1 subsets: Source Handshake SH1 Acceptor Handshake AH1 Talker T6 Listener L4 Service Request SR1 Remote Local RL1 Parallel Poll PP1 Device Clear DC1 Device Trigger DT1 Controller C0 Electrical Interface E2 GPIB IEEE Std. 488.2 Error Handling The IEEE 488.2 UNTERMINATED error (addressed to talk with nothing to say) is handled as follows. If the instrument is addressed to talk and the response formatter is inactive and the input queue is empty then the UNTERMINATED error is generated. This will cause the Query Error bit to be set in the Standard Event Status Register, a value of 3 to be placed in the Query Error Register and the parser to be reset. See Status Reporting below for further information. The IEEE 488.2 INTERRUPTED error is handled as follows. If the response formatter is waiting to send a response message and a has been read by the parser or the input queue contains more than one END message then the instrument has been INTERRUPTED and an error is generated. This will cause the Query Error bit to be set in the Standard Event Status Register, a value of 1 to be placed in the Query Error Register and the response formatter to be reset thus clearing the output queue. The parser will then start parsing the next from the input queue. See Status Reporting below for further information. 16-6 MyFlukeStore Shop for Fluke products online at: www. .com 1.888.610.7664

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271
Users Manual
16-6
Full List of Addressable RS232 Interface Control Codes
02H
Set Addressable Mode.
03H
Universal Unaddress control code.
04H
Lock Non-Addressable mode control code.
06H
Acknowledge that listen address received.
0AH
Line Feed (LF); used as the universal command and response terminator.
0DH
Carriage Return (CR); formatting code, otherwise ignored.
11H
Restart transmission (XON).
12H
Listen Address
−
must be followed by an address belonging to the required
instrument.
13H
Stop transmission (XOFF).
14H
Talk Address
−
must be followed by an address belonging to the required
instrument.
18H
Universal Device Clear.
GPIB Interface
The 24
−
way GPIB connector is located on the instrument rear panel. The pin connections
are as specified in IEEE Std. 488.1
−
1987 and the instrument complies with IEEE Std.
488.1
−
1987 and IEEE Std. 488.2
−
1987.
GPIB Subsets
This instrument contains the following IEEE 488.1 subsets:
Source Handshake
SH1
Acceptor Handshake
AH1
Talker
T6
Listener
L4
Service Request
SR1
Remote Local
RL1
Parallel Poll
PP1
Device Clear
DC1
Device Trigger
DT1
Controller
C0
Electrical Interface
E2
GPIB IEEE Std. 488.2 Error Handling
The IEEE 488.2
UNTERMINATED
error (addressed to talk with nothing to say) is
handled as follows. If the instrument is addressed to talk and the response formatter is
inactive and the input queue is empty then the
UNTERMINATED
error is generated.
This will cause the Query Error bit to be set in the Standard Event Status Register, a
value of 3 to be placed in the Query Error Register and the parser to be reset. See
Status
Reporting
below for further information.
The IEEE 488.2
INTERRUPTED
error is handled as follows. If the response formatter
is waiting to send a response message and a
<PROGRAM MESSAGE TERMINATOR>
has been read by the parser or the input queue contains more than one
END
message
then the instrument has been
INTERRUPTED
and an error is generated. This will cause
the Query Error bit to be set in the Standard Event Status Register, a value of 1 to be
placed in the Query Error Register and the response formatter to be reset thus clearing the
output queue. The parser will then start parsing the next
<PROGRAM MESSAGE UNIT>
from the input queue. See
Status Reporting
below for further information.
Shop for Fluke products online at:
1.888.610.7664
www.
MyFlukeStore
.com