Description Of The Jetsync Blockage System Commands - Jetter JC-120MC User Manual

10 Programming

Description of the JetSync blockage system commands

System command 410
System command 411
System command 412
282
Disable JetSync blockage
Effect:
 The JetSync blockage is disabled for all ports. Bit 8 in R 202962 is reset.
 The Jetter Ethernet system bus multicast frames are transmitted to all ports
(X14, X15 and CPU).
Purpose:
The JetSync blockage enabled by system command 411 or 412 is disabled.
Forwarding the Jetter Ethernet system bus multicast frames to all ports again
corresponds to the on-state of the controller.
Enable JetSync blockage for all ports
Effect:
The JetSync blockage is enabled for all ports (X14, X15, and CPU). Bit 8 in

R 202962 is set.
 Jetter Ethernet system bus multicast frames which are received on a
certain port are not forwarded to any of the other ports.
 All other Ethernet frames are forwarded as usual.
Purpose:
This command lets you prevent forwarding Jetter Ethernet system bus
multicast frames to the CPU and the other ports. This way, networks are split
and thus data traffic - e.g. from the machine network to higher-level networks -
is reduced.
Address space
Splitting is carried out on Ethernet level via the multicast address range of the
Jetter Ethernet system bus.
0x01 00 5E 40 00 00 ... 0x01 00 5E 40 00 FF
Enable JetSync blockage for port X15
Effect:
 The JetSync blockage is enabled for port X15 only. Bit 8 in R 202962 is
set.
 Jetter Ethernet system bus multicast frames of the CPU are forwarded to
port X14 only.
 Jetter Ethernet system bus multicast frames of port X14 are forwarded to
the CPU only.
Jetter Ethernet system bus multicast frames of port X15 are forwarded to

the CPU and to port X14.
All other Ethernet frames are forwarded as usual.

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