4–4
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
PROFIBUS DP
CHAPTER 4: FIELDBUS INTERFACE
The Modbus status (MS) and network status (NS) LEDs indicate the status of the Fieldbus
interface.
Table 4-3: Profibus LED indications
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.
Profibus power supply configuration
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.
7
No connection
P24
+24V power supply
8
L
RxD/TxD-N
Receive/Transmit data; line A (green)
9
No connection
CNTR-N
Repeater control
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.
LED
Color
Description
MS
Green
Processor OK
Off
Processor FAIL
NS
Green
Communications to master OK
Red
Communications to master FAIL
DB9 pin (external device) MM300 pin
Signal
Description
