Measurement Specialties 9116 User Manual
Pressure Systems, Inc. Model 9116 User’s Manual
Page 48
www.PressureSystems.com
Command ‘c’— Sub-command Index 00: Configure A Host Delivery Stream
This sub-command is used to configure the principal parameters of each of the three possible
concurrent host delivery streams, one at a time. Following this configuration phase, the stream
(1, 2, or 3) or all streams may be started and stopped with other sub-commands. The sub-
command’s format is:
concurrent host delivery streams, one at a time. Following this configuration phase, the stream
(1, 2, or 3) or all streams may be started and stopped with other sub-commands. The sub-
command’s format is:
Command
“c 00 st [[[[p]p]p]p sync per f num”
‘c’ is the command letter
‘00’ is the sub-command index (ii) for configuration
‘st’ is the stream id digit (1, 2, or 3)
‘[[[[p]p]p]p’ is a 1-4 hex digit position field (channel selection bit map)
capable of selecting 1-16 internal channels
‘sync’ is sync type character (0= hardware trigger or 1= clock)
‘per’ is the period (if sync=0: # of trigger periods or if sync=1: delay timer
period in msec).
‘f’ is the format of each acquired datum in stream
‘num’ is the number of packets delivered in the stream
(0=unlimited/continuous).
NOTE: all parameters are separated by a space character.
‘c’ is the command letter
‘00’ is the sub-command index (ii) for configuration
‘st’ is the stream id digit (1, 2, or 3)
‘[[[[p]p]p]p’ is a 1-4 hex digit position field (channel selection bit map)
capable of selecting 1-16 internal channels
‘sync’ is sync type character (0= hardware trigger or 1= clock)
‘per’ is the period (if sync=0: # of trigger periods or if sync=1: delay timer
period in msec).
‘f’ is the format of each acquired datum in stream
‘num’ is the number of packets delivered in the stream
(0=unlimited/continuous).
NOTE: all parameters are separated by a space character.
Response
“A”
‘A’ is the acknowledge letter
‘A’ is the acknowledge letter
Autonomous
Packet
none generated
Description: Configures a particular stream (‘st’) to deliver data packets autonomously to the
host, with each packet containing selected acquired data for the channels
specified. The channels are specified by a standard 16-bit position field bit map
(encoded as a 1-4 hex digit position field ([[[[p]p]p]p). A separate sub-command
(ii=05) may be used to select which acquired data are included in each stream.
By default, only pressure (EU) data are selected (if ii=05 sub-command is never
executed for the stream).
The individual data packets of the stream may be synchronized with either an
external user-supplied hardware trigger or a periodic clock interrupt generated
inside each module. This choice is made with the sync type ‘sync’ parameter (a
single digit) where: 0 = synchronize with hardware trigger; 1= synchronize with
periodic software clock.
external user-supplied hardware trigger or a periodic clock interrupt generated
inside each module. This choice is made with the sync type ‘sync’ parameter (a
single digit) where: 0 = synchronize with hardware trigger; 1= synchronize with
periodic software clock.
When the hardware trigger is used to synchronize data output ( sync = 0), it is
assumed that the user would prefer to also synchronize internal data acquisition
cycle. For this reason, when a stream utilizing hardware trigger is started, the
module firmware switches out of the free-running continuous data acquisition
mode described earlier. Instead, the module waits in an idle mode until a
hardware trigger is received to initiate a host stream output. Only on the receipt
of that hardware trigger will the module scan and EU convert all attached
assumed that the user would prefer to also synchronize internal data acquisition
cycle. For this reason, when a stream utilizing hardware trigger is started, the
module firmware switches out of the free-running continuous data acquisition
mode described earlier. Instead, the module waits in an idle mode until a
hardware trigger is received to initiate a host stream output. Only on the receipt
of that hardware trigger will the module scan and EU convert all attached