Programming
Programming
This section describes the Send_Commands, Send_Strings, and Channel commands you can use to program the NXI. The examples in this section require a declaration in the DEFINE_DEVICE section of your program to work correctly. Refer to the NetLinx Programming Language instruction manual for specifics about declarations and DEFINE_DEVICE information.
Using the ID Button
The ID Button on the rear panel of the NXI (FIG. 1 on page 1) is used in conjunction with the NetLinx Studio software program to allow you to assign new Device and System numbers for the NXI.
1.Using NetLinx Studio, place the system in Identity (ID) Mode. ID Mode means the entire system is put on hold while it waits for an event from any NetLinx device in the named system (for example, pushing the ID button on the NXI). The device that generates the first event is the identified device.
2.Press the ID Mode button to generate an event from the NXI and assign new device and system numbers in NetLinx Studio.
Device:Port:System (D:P:S)
A device is any hardware component that can be connected to an AXlink or ICSNet bus. Each device must be assigned a unique number to locate that device on the bus. The NetLinx programming language allows numbers in the range
NetLinx requires a Device:Port:System (D:P:S) specification. This D:P:S triplet can be expressed as a series of constants, variables separated by colons, or a DEV structure. For example:
STRUCTURE DEV
{
INTEGER Number // Device number
INTEGER Port // Port on device
INTEGER System // System the device belongs to
}
The D:P:S notation is used to explicitly represent a device number, port and system. For example, 128:1:0 represents the first port on device 128 on this system. If the system and Port specifications are omitted, (e.g. 128), system 0 (indicating this system) and port 1 (the first port) is assumed. Here's the syntax:
NUMBER:PORT:SYSTEM
where:
NUMBER: | |
PORT: | |
| ports on the Controller or device) |
SYSTEM: |
NXI NetLinx Integrated Controller | 7 |
|
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