Philips 6652C - Page 39

__ _ ___: I:.::.:.N :_:::_ TRODUCTION
The PM 6652,-54 timer/counters have been de-
signed for use in automatic test system appli-
cations, featuring e.g. 19" cabinet, provJ.sJ.on
for rear panel inputs and optional fan cooling.
All software needed for the bus operations ar-e
included as standard, wher-eas the optional
PM 9696 interface board is the hardware required
for connection to the IEEE-488 bus.
PM 6652,-54 timer/counters equipped with a
PM 9696 IEEE-488 Bus Interface meet the require-
ments of IEC-625-1 and IEEE-488 as far as hard-
ware is concerned. They also satisfy the requi-
rements concerning codes and formats according
to IEC-625-2 and IEEE-728.
When ordered simultaneously with a counter, the
interface is supplied factory installed, but is
available as a separate option for field instal-
lation. When installed, all front and rear panel
functions are remotely accessible via the IEEE-
488
bus.
The BUS performance features include:
Full programmability of all front and rear pa-
nel controls (except power on/off Hold Off*
time and int/ext reference selector).
- Monitoring of HIGH/LOW limits with SRQ alarm.
High measuring speed. In normal bus data
transfer mode the number of readings is approx
30-50/sec. depending on measuring function
(measuring time is Min. or single),
- Computer dump output mode {output of "raw"
register data) yields approx. 400 ..• 500 rea-
dings/sec.
BUS LEARN mode for quick and easy programming
of the counters.
- a· preprogrammed front-panel menus can be re-
called via the IEEE-488 Bus with a single in-
struction.
The PM 6652,-54 can be programmed in 3 different
ways: P1 ..• P8 programming, bus learn mode and
normal programming.
*) The PM 6654C has a function called Time
Interval Delay, which is similar to the
Hold-Off but fully bus programmable. See
page
5-10.
P1 ••• P8 programming
The simplest and easiest way is to specify up to
eight different mesurements and manually set all
corresponding controls and store them in loca-
tions P1 ••• P8 in the counters.
After that, bus programming is only a matter of
selecting one of of the 8 possible menus
(P1. .. PS). This is done simply by sending pro-
gramming code "LP1 ••• LPB" to the counter.
This ultra-simple programming method is suitable
for lab cluster applications where different
temporary measurements are carried out and where
is no time or no need for sophisticated BASIC
programming techniques.
A sample program for HP 85 is shown below, where
the purpose is to print-out frequency measure-
ments
(stored in P3). The controller's address
to the counter is 710 (the counter's address se-
lection switch is factory preset at 10).
10 OUTPUT 710; " LP3"
20 ENTER 710; A$
30 PRINT A$
40 END
With this ultr-a-simple programming method it is
neccessary to remember only one single mnemonic
(LP).
Bus Learn mode or P9 ••• Poo
"Bus
learn" means that the controller copies all
manual counter settings and stores the setting
in the controller's own memory. The settings are
stored as a "counter programming status string"
and this string can later be sent to the counter
for reprogramming.
The bus learn mode extends the memory locations
P1 ... P8 (in the counter) to P9... P oo (in
the controller) •
The procedure for storing e.g. "P9" is:
1. Manually set all counter controls for the
desired measurement.
NOTE: The Time Interval Delay* and Voltage
measurement on
the B input must be selec-
ted from the bus, if to be used.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com