Solartron Mobrey 3595 4C, User Manual

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3595 4C User Manual Part One The 3595 4C Interface
1-3
35952350 (CH01/AA)
1.4 INTERFACE FACILITIES
1.4.1 IMP Commands
The IMPVIEW software communicates with the 3595 Series IMP using commands in the form of character
strings. For example, the reset command is RE .
A command may need to be made more specific by using it with a number. An example of this is the
command
CL2 , which means: ‘clear event totalise counter on channel 2’.
Several commands may be sent in a command string. Each command in the string is separated from it’s
neighbour by a semicolon. A simple example of a command string is
ST;CL2 . This particular command
tells a digital IMP to return its’ status and then clear the event totalise counter on channel 2.
IMP commands and responses are dealt with in Part two of this manual.
1.4.2 IMP Data Streams
The 3595 Series IMP is able to return four types of data, each data type having an individual format. S-Net
protocol segregates these data types and returns each type on it’s own data stream. This approach allows
application software to categorise and attach different priorities to data types, thus improving the speed
with which high priority data (such as event timing) is handled.
The data types conveyed by each stream are as follows:
Stream 0 Scanned measurements (series of channels), or long numeric responses
Stream 1 Single channel measurement, or short numeric responses
Stream 2 Event information (3595 2A and 3595 2B only)
Stream 3 Command responses, in ASCII characters. Typical examples of this data type are status
information or command confirmation.
1.4.3 IMP Addresses
Each 3595 Series IMP in the system must have a unique address . The IMP is assigned an address by a
pair of rotary switches inside the IMP connector block. The procedure for setting these switches is as
described the
“3595 Series IMP Installation Guide” . The 3595 4C Interface card can handle up to 50 IMP
devices, with addresses in the range of 1 to 50 inclusive.