Atlas Copco PowerMACS 4000, User Manual

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Peripheral Devices
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To enable access to PowerMACS via a serial protocol add an external communication device as
described in previous chapter. Add it to a TC that has a PLC, i.e. the first TC in a station. Set up which
Type of protocol to use, which port to use and port characteristics.
If you want to transfer Process data over the external communication device then you must first create a
–
Reporter for it. How this is done is described in the chapter: New reporter and Edit reporter.
8.13.1 Accesses from External communication device
To access data in PowerMACS external devices should perform normal read and write operations.
Depending on address different data is available:
Address Data Length Read/Write
0..999 Variables in PLC area 1 Length of area as defined by drivers EXTCOM_in
and EXTCOM_out on the IO_Configuration
worksheet R/W
1000 Cycle data 2..Max R/W
2000 Events 2..Max R/W
3000 Traces 2..Max R/W
4000 Setup 2..Max R/W
6000-9999 Variables in PLC area 2 Length of area as defined by drivers EXTCO2_in and
EXTCO2_out on the IO_Configuration worksheet R/W
Max depends on which serial protocol that is used.
A read or write to an address between 0 and 999 will access a memory that the PLC on that TC can
access, thereby providing a way to communicate with the PLC. See the chapter: Access to PLC data for
how to enabled this.
The PLC area 2 at address 6000-9999 can be used for transfer of large data, e.g. formatted cycle data.
The PLC must set a positive flank (0->1) in the system global UPDATE_EXTCO2 to get this area updated.
By accessing address 1000-4000 the external device can get access to Process data.