Fluke PM6685, PM6681R Interface Functions, Power-on, Testing the Bus, What can I do with the Bus?

Getting Started

The address can also be set via a GPIB command or from the AUX MENU on the PM6680B/1/5. The set address is stored in nonvolatile memory and re- mains until you change it.

Power-on

When turned on, the counter starts with the setting it had when turned off.

￿Standby

When the counter is in REMOTE mode, you cannot switch it off. You must first enable Local control by pressing LO- CAL.

Testing the Bus

To test that the instrument is operational via the bus, use *IDN? to identify the in- strument and *OPT? to identify which options are installed. (See ‘System Sub- system’ , *IDN? and *OPT?)

Interface Functions

What can I do with the Bus?

All the capabilities of the interface for the PM6680B-series are explained below.

￿ Summary

Description,	Code
Source handshake,	SH1
Acceptor handshake,	AH1
Control function,	C0
Talker Function,	T6
Listener function,	L4
Service request,	SR1
Remote/local function,	RL1
Parallel poll,	PP0
Device clear function,	DC1
Device trigger function,	DT1
Bus drivers,	E2

￿SH1 and AH1

These simply mean that the counter can exchange data with other instruments or a controller using the bus handshake lines: DAV, NRFD, NADC.

￿Control Function, C0

The counter does not function as a con- troller.

￿Talker Function, T6

The counter can send responses and the results of its measurements to other de- vices or to the controller. T6 means that it has the following functions:

–Basic talker.

–No talker only.

–It can send out a status byte as response to a serial poll from the controller.

–Automatic un-addressing as a talker when it is addressed as a listener.

Interface Functions 1-5