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For normal communication between Xpanel and PMAC, some I-variables should have the values described below.
I-variable | Set Value | Remark |
I0 | 0 .. 15 | The station number ‘0’ is the default value of PMAC. To set up the PMAC to communicate as station 1 to 15 on a multi-drop serial cable, first communicate with the board as station 0. Set I0 to specify the new station number. Also, set I1 to 3 to enable the station number addressing. |
I1 | 3 | CS handshake is not used; the software card address is required. |
I3 | 2 | Communication handshake style and code. |
I4 | 0 | Checksum disabled, serial errors reported immediately. |
I6 | 1 | Error reporting mode. |
I9 | 0 or 2 | 0 (short form of the decimal) or 2 (short form of hexadecimal). |
I63 | 1 | Echo the <Control-X> character. |
I64 | 1 | Enable the internal response tag. |
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The following table shows the list of devices that can be referenced in the Xpanel database.
Symbol | Description | Address Range | Type | Access |
I | Variable of fixed meaning for card setup | 0-8191 | Analog | R/W |
P | Global variable for programming use | 0-8191 | Analog | R/W |
M | Variable assigned to a memory location for user | 0-8191 | Analog | R/W |
Q | Local variable for programming use | 0-8191 | Analog | R/W |
DELTA TAU PMAC communication driver supports only the FLOAT data type.
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