Owner manual

ABC 040104
3-13
TABLE 3-4. IEEE 488 (GPIB) BUS INTERFACE FUNCTIONS
FUNCTION
SUBSET
SYMBOL
COMMENTS
Source Handshake SH1 Complete Capability (Interface can receive multiline messages)
Acceptor Handshake AH1 Complete Capability (Interface can receive multiline messages)
Talke r T6
Basic talker, serial poll, unaddress if MLA (My Listen Address) (one-byte
address)
Listener L4 Basic listener, unaddress if MTA (My Talk Address) (one-byte address).
Service Request SR1
Complete Capability. The interface sets the SRQ line true if there is an
enabled service request condition.
Remote/Local RL1
Complete capability. Interface selects either local or remote information. In
local mode the ABC executes front panel commands, but can be set to
remote mode via IEEE 488 bus. When in Remote mode all front panel keys
are disabled except LOCAL. LOCAL key can be disabled using keypad
lockout command (see Appendix B, PAR. B.91) so that only the controller
or a power on condition can restore Local mode.
Parallel Poll PP0 No Capability
Device Clear DC1
Complete Capability. ABC accepts DCL (Device Clear) and SDC (Selected
Device Clear).
Device Trigger DT1 Respond to *TRG and <GET> trigger functions.
Controller C0 No Capability
TABLE 3-5. IEEE 488 (GPIB) BUS COMMAND MODE MESSAGES
MNEMONIC
MESSAGE
DESCRIPTION
COMMENTS
ATN Attention Received
DAC Data accepted Received or Sent
DAV Data Valid Received or Sent
DCL Device Clear Received (see PAR. 3.4.1)
IFC Interface Clear Received
MLA My Listen Address Received
MTA My Talk Address Received
OTA Other Talk Address Received
RFD Ready for Data Received or Sent
SDC Selected Device Clear Received
SPD Serial Poll Disable Received
SPE Serial Poll Enable Received
SRQ Service Request Sent
UNL Unlisten Received
UNT Untalk Received