26
Initial Setup Procedure
Section 2-4
2-3-6
Connection for R88A-MCW151-E Host Link Communications
The R88A-MCW151-E uses Host link communications over 4-wire RS-422A.
The figure below shows the connection between one PROFIBUS-DP Gate-
way Unit and 1 to 15 R88A-MCW151-E units.
Note
1.
If the PROFIBUS-DP Gateway Unit is connected on one end of the trans-
mission circuit, the termination resistor must be enabled on the Unit, by
setting Switch 2 to ON.
2.
The R88A-MCW151-E connected at one end of the transmission circuit,
must also have its termination resistor enabled, by setting Pin 3 of DIP-
switch SW2 to ON.
2-4
Initial Setup Procedure
After mounting the PROFIBUS-DP Gateway Unit, the following Initial Setup
Procedure must be applied to allow the Unit to start up properly and to be con-
figured for operation.
• A unique PROFIBUS node address must be selected, before the unit’s
power supply is turned on, see section
2-4-1 Selecting a node address
.
• Select the required baud rate to be used on the Host Link or Compoway-
F network, using the DIP-switches. Disable the Auxiliary port, using the
DIP-switches.
• Select the required physical layer, either RS-422 for a Host Link network,
or RS-485 for a Compoway-F network. Switch number 1, directly over the
RS-422 / RS-485 connector is to be used for making the selection.
PRT1-SCU11
RS-
422A
Inter-
face
Signal Pin
R-
1
R+
2
FG
3
S-
4
S+
5
R88A-MCW151-E unit
Pin
Signal RS-
422A
Inter-
face
1
RD-
2
RD+
3
FG
4
SD-
5
SD+
R88A-MCW151-E unit
Pin
Signal RS-
422A
Inter-
face
1
RD-
2
RD+
3
FG
4
SD-
5
SD+
RS-422A Port
Connector
Phoenix Connector
RS-422A Port
Connector
Switch SW1: OFF
Switch SW2: ON
DIP switch SW2
Pin 1 OFF
Pin 2 OFF
Pin 3 OFF
DIP switch SW2
Pin 1 OFF
Pin 2 OFF
Pin 3 ON