Philips System 21 Quick Operating Manual page 20

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DATA- AND STATUS-REQUEST COMMANDS WITH RESPONSES
A summary of all request commands for output- and status-data with the
corresponding responses is given below. The left column gives the command level
to which each command is applicable. In the following statements given fo r P2000C
and HP85, the commands shall be filled in in the place of "cmd ". The request
command shall be followed by an INPUT/ENTER command to read the requested
data. All responses , mentioned in the summary, from the master are preceded by
"AID ;", those from the slaves are preceded by "AID nnn; ".
Command level
Statement on P2000C Statement on HP85
IEEEIIEC-interface IEC PRINT #11 ,''cmd "
OUTPUT 711 ,''cmd "
Master IEC PRINT # 11 ,''AID ;cmd "
OUTPUT 711 ,''AID ;cmd "
Slave
IEC PRINT # 11 ,''AIDnnn ;cmd " OUTPUT 711 ,''A1Dnnn ;cmd "
I
" nnn" represents the unit address of the addressed slave
Requested data Command data Description
Response data
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Functional data " ?" Request for functiona l data.
Response: < slave data > These data are specified in the
operating cards of the units.
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Data available
" DAV ?"
Request for the unit addresses
which have DAta Available.
Response: " DAV" + < addresses > List of addresses of all units which
Example: "DAV 310,311 ,312 ,'' have data available.
Warning: The master will poll all
PM-numbers, which may take a
few seconds maximum.
0 Ready-line
" ROY? " Logic state of the ready-line ?
Response:
" ROY 0"
if ready-line is low (ready false)
"ROY 1"
if ready-line is high (ready true).
0 Busy Block or Scan " BBS ?" Which units are Busy with
a Block or a Scan ?
Response :
" BBS " + < addresses >
List of all units which are Busy
Example:
" BBS 210,211 ,212,'' with a Block or a Scan.
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