User guide

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enFORCE DSP1500 Main Unit Hardware Manual

(Rev. 4.0) PAGE 5 - 32

Chapter 5: Control Interfaces

5.6.1 Component Descriptions

Fieldbus Interface Connection

Pin No. Signal Description

1 N.C.

2 N.C.

3 B- Line Positive RxD/TxD according to RS485 Spec.

4 RTS Request to send

5 GND Bus Isolated GND from RS 485 side

6 +5V Bus Isolated +5V from RS 485 side

7 N.C.

8 A- Line Negative RxD/TxD according to RS485 Spec.

9 N.C.

(9 pin female D-sub) Housing Shield Connected to PE

Termination

Termination of the fieldbus requires a terminating resistor at each end of the

fieldbus. A termination switch is provided on the Profibus-DP interface board.

Set the switch to “ON”, if termination is required. If external terminators are

used, the switch must be in the off position.

Node Address

Before configuring the Profibus-DP module, the node address has to be set.

This is done with two rotary switches on the module which can set the node

address 1-99 in decimal format. The Upper rotary switch (closest to the D-sub)

sets the “tens” digit (10x), and the bottom rotary switch sets the “ones” digit (1x).

Example: To set node 37, place the “tens” digit switch on 3 and the “ones” digit

switch on 7.

This switch must be set before power is on, and cannot be changed

during operation.

Status LEDs

LED Status Description

1 - Not Used

Off

Module not on-line

Green Module is on-line and data exchange is possible.

Off

Module is not off-line

Red

Module is off-line and data exchange is not

possible.

Fieldbus

Diagnostics

Off No diagnostics present.

Red flashing at 1

second intervals

Error in configuration: IN and/or OUT length set

during initialization of the module is not equal to

the length set during configuration of the

network.

Red flashing at 1/2

second intervals

Error in user parameter data: The

length/contents of the User Parameter data set

during initialization of the module is not equal to

the length/contents set during configuration of

the network.

Red flashing at 1/4

second intervals

Error in initialization of the PROFIBUS

communication ASIC.