COMMUNICATIONS GUIDE | FIELDBUS INTERFACE |
Fieldbus interface
The fieldbus interface is configurable as either Profibus DPV0 or DeviceNet. Both Fieldbus interfaces support control and status – refer to the specific data map below for details.
Note that external power, 5 to 24 VDC, is required for this interface to operate. (Ensure that switches 7 and 8 of the DIPswitch on the communication card, are ON.)
Profibus protocol (DP V0)
To enable the Profibus physical interface, ensure that switches 3 and 4 of the DIP switch on the communications card (on the CPU module) are on. The external connections through the Fieldbus interface are as follows.
Table 10: Fieldbus interface external connections (Profibus)
Pin | Connection (external device) |
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V– | Pin 5 |
L | Pin 8, line A (negative TX/RX) |
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C | Common drain |
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H | Pin 3, line B (positive TX/RX) |
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V+ | Pin 6 |
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The Modbus status (MS) and network status (NS) LEDs indicate the status of the Fieldbus interface.
Table 11: Profibus LED indications
LED | Color | Description |
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MS | Green | Processor OK |
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| Off | Processor FAIL |
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NS | Green | Communications to master OK |
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| Red | Communications to master FAIL |
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When used for Profibus, the fieldbus port has the following characteristics.
•Baud rate: 9600, 19200, 31250, 45450, 93750, 187500, 500000, and 1.5M bps (auto- detect)
•Address: 1 to 125
•Vendor ID: 3005 (hex)
•Data table size: inputs = 240 bytes, outputs = 240 bytes
Output bit must be 1 for a minimum time of 100 ms, to be actioned.
Profibus Output Data
Bit | Description |
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1 | Reset |
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2 | Lockout Reset |
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3 | Stop |
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4 | Start A |
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5 | Start B |
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Commands are actioned on rising edge (0 to 1 transition).
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE | 53 |