Fluke RPM4 manual Status Reporting System, Error Queue, Status Byte Register, ZOFFSETn

RPM4™ OPERATION AND MAINTENANCE MANUAL

ZOFFSETn

Purpose	Read or set the AutoZ pressure offset (Poffset) for the specified or active Q-RPT in the current
	measurement mode.
Command	“ZOFFSETn GaOffset , AbsOffset , DifOffset”
Query	“ZOFFSETn?”
Classic	“ZOFFSETn =GaOffset , AbsOffset , DifOffset”
	“ZOFFSETn”
Defaults	“ZOFFSETn = 0.0, 0.0, 0.0”			(Gauge Q-RPT)
	“ZOFFSETn = 101325, 0.0, 0.0” (Absolute Q-RPT)
Optional Suffix	“n”	The active Q-RPT is assumed if no suffix is given.
		‘1’	“:HI”	Specify the Hi Q-RPT
		‘2’	“:LO”	Specify the Lo Q-RPT
Arguments	GaOffset:	The Q-RPT pressure offset (“Poffset”) for Gauge measurement mode (Pa).
	AbsOffset:	The Q-RPT pressure offset for absolute measurement mode (Pa)
	DifOffset:	The Q-RPT pressure offset for differential measurement mode (Pa)
Remarks	The pressure offset (Poffset) for the specified Q-RPT (Hi or Lo) can be accessed with this
	program message. There are separate offsets for gauge, absolute and differential
	measurement modes, but not all modes apply in all cases. Gauge Q-RPTs do not support
	“AbsOffset”. “DifOffset” applies only to the “Hi” Q-RPT.
	Using this program message overwrites the current offset, so caution must be used.
	Changes made using this program message take effect immediately.
Example	Cmd sent:	“ZOFFSET1 2.1, 0, 0”
(enhanced)	Query reply:	“ 2.10 Pa, 0.00 Pa, 0.00 Pa”
Example	Sent:	“ZOFFSET=97293.1, 3.02, 0”
(classic)	Reply:	“	97293.10, 3.02, 0.00”
Errors	ERR# 6:	One of the arguments is out of range.
See Also	3.5.1

4.5STATUS REPORTING SYSTEM

The RPM4 status reporting system is used to track and report system status and errors. It follows the model of the IEEE Std 488.2 and works for the COM1 and the IEEE-488 port with slight differences. The RPM4 can be programmed to respond to various status conditions by asserting the SRQ of the IEEE-488 interface. The COM1 port cannot be supported in such a way, so polling must be used.

4.5.1 ERROR QUEUE

The RPM4 keeps track of remote errors by using an error queue. If an error occurs, it is pushed onto the Error Queue. If you are using the COM1 port, the error number is immediately replied in the form “ERR#nn where nn is the error code from 0 to 99. The “ERR?” (or “ERR”) query can then be used to pull the error from the Error Queue in it’s descriptive text format. If you are using the enhanced program message format, the Error Queue will accumulate errors until full unless they are pulled from the queue. If you are using the classic program format, the Error Queue is cleared every time a new program message is received.

4.5.2 STATUS BYTE REGISTER

The RPM4 contains an 8 bit Status Byte Register that reflects the general status of the RPM4.

Table 18. 8 Bit Status Byte Register

OPER	RQS/MSS	ESB	MAV	N/A	ERROR	N/A	RSR
(128)	(64)	(32)	(16)	(8)	(4)	(2)	(1)

This register is affected by the RPM4 reply output queue, the Error Queue, the Standard Event Status register and the Ready Event Status register.

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