PPollConfig Function

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Configures a device for parallel polls.

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

Inputs/Outputs

bus —

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 —

address configures the GPIB device at address for parallel polls according to the dataline and sense parameters.

If a secondary address is required, use the MakeAddr function to put the primary and secondary addresses in the proper format.

dataline —

dataline is the data line, 1 to 8, on which the device responds to the parallel poll.

sense —

sense indicates the condition under which the data line is asserted or unasserted.

The device compares the sense value, TRUE or FALSE, to its individual status bit and responds accordingly.

error in —

error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

status —

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