G&L MMC-A2, Hardware Manual

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Standalone MMC Control
G & L Motion Control Inc. MMC Hardware Manual 81
A/D converter. These filters improve the noise
immunity of the module.
4.8 SERCOS Motion Control Connections &
Operation
This section provides information on connecting to the SERCOS Motion
Control board, which is located on the left side of a SERCOS MMC Control.
The MMC SERCOS board is an alternate type of motion control used as part
of an MMC base unit. It provides an interface between the MMC and a fiber
optic ring. A ring can have from one to eight SERCOS slaves. The module
contains an on board processor. There is one SERCOS ring port located at
the center of the module. This ring port has a receive and a transmit fiber
optic connector. There is also an RS232 port used for loading FLASH
memory updates.
The SERCOS board is controlled by an application created in PiCPro. An
on-board processor interprets the functions and performs appropriate
operations according to the SERCOS communications protocol.
The data transfer rate is 4M Baud with user-defined update rate.
If a scan loss occurs, SERCOS communications are reset. There is no
communication with the SERCOS slaves until they are re-initialized.
4.8.1 SERCOS Receive and Transmit Ports
The SERCOS Receive Port and Transmit Port connectors (labeled
“RECV” and “XMIT” on the front of the Module) located in the
center of the board can connect to one SERCOS ring. The
connection to this ring is made through a pair of female fiber optic
SMA connectors. The module’s transmitter is connected to the first
receiver in the loop and the module’s receiver is connected to the
last transmitter in the loop.
Available SERCOS cables are shown in Table 4-34 .