Description of the Display and Operational Control Components
 
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Layout of the Components
Layout of the Display and Operational Control Components 
1
LED 
2
Address switch for the PROFIBUS DP address
Status of the LED Display
Status of the LED display:
LED
Status
Meaning
BF
Red
Bus error:
The internal watchdog has responded or a reset has occurred.
Off
The module is working in a data exchange cycle.
Address Settings
The user must assign a PROFIBUS DP address to each device. For Momentum family slaves, this address is between 1 and 99. The address allocation is dependent on the physical arrangement of the modules on the PROFIBUS DP.
The address is set on the front side of the communications adapter, and must be identical to the one allocated during bus configuration. This ensures that all outgoing and incoming messages within the network reach the device for which they are intended.
Setting the PROFIBUS DP address to 36
Possible PROFIBUS DP addresses
PROFIBUS DP Address
Upper Address Switch (x 10)
Lower Address Switch (x 1)
1 ... 9
0
1 ... 9
10 ... 19
1
0 ... 9
20 ... 29
2
0 ... 9
30 ... 39
3
0 ... 9
40 ... 49
4
0 ... 9
50 ... 59
5
0 ... 9
60 ... 69
6
0 ... 9
70 ... 79
7
0 ... 9
80 ... 89
8
0 ... 9
90 ... 99
9
0 ... 9
CAUTION
Addressing on the PROFIBUS DP
Do not begin operating any module before the slave address has been set. See your network administrator to find out the correct device addresses.
Should you need to modify the addresses while the module is in operation, the power supply must be switched off and then on again. This is because addresses are only uploaded at the point when voltage is applied.
No duplicate addresses may be used with the PROFIBUS, because this can lead to conflicts on the bus.
Failure to follow these instructions can result in injury or equipment damage.
Interface Assignment
Communications adapter pin assignment (sockets)
Interface assignment
Terminal
Signal
Meaning
3
RxD/TXD-P
Incoming data (RxD) positive,
Outgoing data (TxD) positive
5
DGND
Reference potential for terminations, only applies to connectors with termination (supplied by the I/O module)
6
VP
Supply voltage for terminations, only applies to connectors with termination (+5 V supplied by the I/O module)
8
RxD/TXD-N
Incoming data (RxD-N) negated,
Outgoing data (TxD-N) negated
1, 2, 4, 7, 9
Pin not connected
Connector housing
Cable shield connection (internally connected)