Profibus Power Supply Configuration - GE MM300 Manual

PROFIBUS DP

Profibus power supply configuration

4–4
DB9 pin (external device)
7
8
9
1.The MM300 can accept an external voltage level up to 24VDC on its V- and V+ terminals.
Note that specifically for termination, the voltage must be reduced to 5V; refer to the
Profibus Termination section below.
The Modbus status (MS) and network status (NS) LEDs indicate the status of the Fieldbus
interface.
Table 4-3: Profibus LED indications
LED Color
MS Green
Off
NS Green
Red
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 126
• Vendor ID: 4D20 (hex)
• Data table size: inputs = 174 bytes, outputs = 2 bytes
• To be actioned, output bit must be 1 for a minimum time of 100 ms.
* Profibus communications will operate only in 1.5Mbps or auto-detect with the present
implementation. Auto-detect includes baud rates 19.2 kbps, 187.5 kbps, 500 kbps, and 1.5
Mbps.
The Profibus DP Master must read the GSE (Device Master Data) file of the MM300 for the
purposes of configuration and parameterization. The GSE file for the MM300 is named
GEMU4D20.gse.
The Profibus port has two modes of powering the electronics: internal or external. In
internal mode, a local 5 V is used, so no external voltage is required (pin 1 and pin 5 of the
connector). In external mode, the user must supply an external bus voltage on pin1 and pin
5 of the connector. Profibus is shipped from the factory configured for internal mode. Use
the figures below to configure the the comms board power supply.
MM300 pin Signal
No connection P24
L RxD/TxD-N
No connection CNTR-N
Description
Processor OK
Processor FAIL
Communications to master OK
Communications to master FAIL
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 4: FIELDBUS INTERFACE
Description
+24V power supply
Receive/Transmit data; line A (green)
Repeater control