Pressure Systems 9022 Uživatelský manuál stáhnout pdf (Strana 44)

www.meas-

spec.com

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

3 - 11

3.1.4.4 Delivery of Acquired Data To Host

Several commands apply to host delivery of acquired data, either on demand or autonomously.

The Read High Precision Data (‘r’) command may be used to obtain high precision data

(selected channels in various formats). The modules also provide several high-speed, high

resolution output commands. The Read High-Speed Data (‘b’) command is used to read “pure

binary” engineering unit pressure (all channels in the lowest overhead format). Use the ‘r’ and ‘b’

commands to get acquired data on demand.

The module can also deliver EU pressure data in streams, which consist of TCP/IP or UDP/IP

data packets that arrive autonomously in the host (with data from selected channels being

delivered in various formats at various rates). Up to three independent streams may be

configured, started, stopped, and cleared with the Define/Control Autonomous Host Streams

(‘c’) command. In conjunction with hardware triggering, this autonomous delivery method can

also make the module acquire (as well as deliver) data in its most efficient and time-synchronized

manner. This also frees the host to receive, process, or record these data in its most efficient

manner, since it need not waste time continually requesting new data with commands.

The modules also have special purpose on demand data acquisition commands, including: Read

Transducer Voltages (‘V’) and Read Transducer Raw A/D Counts (‘a’), which provide two

views of raw pressure data. It has similar commands providing EU temperature (°C) and other

raw views of each channel’s special temperature signal, including Read Transducer

Temperatures (‘t’), Read Temperature A/D Counts (‘m’), and Read Temperature Voltages

(‘n’). This command group is generally used for diagnostic purposes. All of these special

purpose data (plus other module status information) may also be periodically delivered to the host

automatically in any of the three flexible autonomous streams configured by the ‘c’ command.

3.1.4.5 Network Query and Control Functions

A special subset of three (3) UDP/IP commands may be sent to a module at any time power is

applied to it (i.e., neither a host socket connection nor a unique IP Address assignment is

required). Each such command is broadcast to all modules (i.e., sent to IP Address

255.255.255.255) via Port 7000, and any module wishing to respond will return a UDP/IP

broadcast response via Port 7001.

Only one of these commands returns a response. This is the Network Query (“psi9000”)

command. The others cause the module to be re-booted, therefore no response is possible. One

command changes the way the module gets its IP address assignment (i.e., dynamically from a

server or statically from factory-set internal data).

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 193 194

Žádné komentáře

Pressure Systems 9022 Uživatelský manuál Strana 44