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IM 760151-17E
Multi-line message
Eight data lines are used to transmit a message. Multi-line messages are classified as
follows.
Address commands
Valid when the equipment is designated as a listener or a talker. The following five
address commands are available.
Commands valid for equipment designated as a listener
GTL (Go To Local)
SDC (Selected Device Clear)
PPC (Parallel Poll Configure)
GET (Group Execute Trigger)
Command valid for equipment designated as a talker
TCT (Take Control)
Universal commands
Valid for any item of equipment, irrespective of whether the item is designated as a
listener or a talker. The following five universal commands are available.
LLO (Local Lockout)
DCL (Device Clear)
PPU(Parallel Poll Unconfigure)
SPE (Serial Poll Enable)
SPD (Serial Poll Disable)
In addition to the above commands, a listener address, talker address on secondary
command can be sent in an interface message.
Uni-line
Messages
★IFC
★REN
IDY
Listerner
address
Messages marked with a "★" are interface messages supported by the WT1600FC
Note
Differences between SDC and DCL
The SDC command is an address command and requires that both the talker and listener be
designated; however DCL is a universal command and does not require that the talker and
listener be designated. Therefore, SDC is used for particular items of equipment, while DCL can
be used for any equipment connected to the communications bus.
1.6 Response to Interface Messages
Interface Messages
Multi-line Messages
Address
command
★GTL
★SDC
PPC
★GET
TCT
Talker
Secondary
address
command
Universal
command
★LLO
★DCL
PPU
★SPE
★SPD
1-7
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