AllSpoll Function

Owning Palette: GPIB 488.2 Functions

Requires: Base Development System

Serial polls all devices.

Although the AllSpoll function is general enough to serial poll any number of GPIB devices, use the ReadStatus function when you serial poll only one GPIB device.

Refer to GPIB Function Defaults for more information about the timeout and address defaults.

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	bus refers to the GPIB bus number. If you have only one GPIB interface in your computer, the default bus number is 0. Refer to the software installation instructions included with the GPIB controller for additional GPIB interfaces.
	address list serial polls GPIB devices whose addresses appear in address list. If a secondary address is required, use the MakeAddr function to put the primary and secondary addresses in the proper format.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	serial poll byte list contains the responses of the devices whose addresses are contained in the corresponding elements of address list.
	status is a Boolean array in which each bit describes a state of the GPIB Controller. If an error occurs, the function sets bit 15. GPIB error is valid only if bit 15 of status is set. The following table shows the numeric value and symbolic status of each bit in status. This table also includes a description of each bit. Status Bit Numeric Value Symbolic Status Description 0 1 DCAS Device Clear state 1 2 DTAS Device Trigger State 2 4 LACS Listener Active 3 8 TACS Talker Active 4 16 ATN Attention Asserted 5 32 CIC Controller-In-Charge 6 64 REM Remote State 7 128 LOK Lockout State 8 256 CMPL Operation Completed 12 4096 SRQI SRQ Detected while CIC 13 8192 END EOI or EOS Detected 14 16384 TIMO Timeout 15 -32768 ERR Error Detected
	byte count contains the index of any device that times out instead of responding to the poll. On success, byte count returns the number of responses in serial poll byte list. If an error occurs, byte count returns the index of address list of the first address that timed out or was invalid.
	error out contains error information. This output provides standard error out functionality.