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Measurement Specialties Inc. NetScanner System (9016, 9021, & 9022) User’s Manual

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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:

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.

Response

“A”

‘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.

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Pressure Systems 9022 Manual de usuario Pagina 66