S748-772 Instructions Manual | 11 Expansions
11.1.4.3 Connection diagram
Layout of the sercos
®
bus system in ring topology, with fiber optical cables (schematic).
11.1.4.4 Setup
Modifying the station address
The drive address can be set to a value between 0 and 63. With address 0, the drive is
assigned as an amplifier in the sercos
®
ring. Set the station address with the:
Keys on the front of the servo amplifier
The sercos
®
address can be modified using the keys on the front of the amplifier (➜ # 120).
Setup software
The address can also be modified in the setup software, “CAN/Fieldbus” screen (please refer
to the setup software Online Help). Alternatively, enter the command ADDR # in the “Ter-
minal” screen, where # is the new address of the drive.
Modifying the baud rate and optical power
If the baud rate is not set correctly, communication is not possible.
The SBAUD # parameter can be used to set the baud rate, where # is the baud rate. If the
optical power is not set correctly, errors occur in telegram transmission and the red LED on
the drive lights up. During normal communication, the green send and receive LEDs flash, giv-
ing the impression that the relevant LED is on.
The SLEN # parameter can be used to specify the optical range for a standard 1 mm² glass
fibre cable, where # is the length of the cable in meters.
SBAUD SLEN
2 2 Mbaud 0 m Very short connection
4 4 Mbaud 1…< 15 m Length of the connection with a 1 mm² plastic cable
8 8 Mbaud 15…< 30 m Length of the connection with a 1 mm² plastic cable
16 16 Mbaud ≥ 30 m Length of the connection with a 1 mm² plastic cable
The parameters can be modified in the setup software, “SERCOS” screen (please refer to the
setup software the Online Help). Alternatively, the commands SBAUD # and SLEN # can be
entered in the “Terminal” screen.
132 Kollmorgen | kdn.kollmorgen.com | July 2019
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