Omron CS1W-PRM21 - Global_Control Message (Word N+2)

88
Allocated CIO Area Words
Section 4-2
4-2-2 Global_Control Message (Word n+2)
A PROFIBUS Global_Control message can be transmitted by the Unit on user
demand to either
Global_Control Multicast
command
• one or more groups of slave stations allocated to the PROFIBUS-DP
Master Unit (Multicast command), or
Global_Control Broadcast
command
• all slave stations allocated to the PROFIBUS-DP Master Unit (Broadcast
command).
The number of the group to which each slave station belongs, is defined in its
parameterization message. Only the slave stations assigned to the groups to
which the Global_Control message is addressed will process the command.
Group address setting The group address to send the message to is specified in bit 00 though bit 07.
Selecting specific groups of slave stations (i.e. a Multicast command),
requires setting of one or more bits in this range to ON. Selecting all slaves
(i.e. a Broadcast command) requires all bits in this range to be set to OFF.
The Global_Control command flags are specified in the bit 10 through bit 13.
Transmitting the message is done by setting the Transmit Global Control
message switch, bit 04 in CIO Word n, see
4-2-1 Software Switches 1 (Word
n)
.
04 Transmit
Global_Control
message
OFF→
ON
User Upon setting this switch the Unit will transmit one Global_Control mes-
sage over the network. The contents of the message is defined in CIO
Word n+2, see
4-2-2 Global_Control Message (Word n+2) .
OFF Unit The bit will be turned OFF by the Unit if the Global_Control message
has been transmitted.
05
to
07
Reserved by sys-
tem
--- --- These bits are ignored in the Unit. If set, they will be immediately
returned to OFF.
08 Clear new diagnos-
tics bits
OFF→
ON
User Upon setting this switch the Unit will clear all new diagnostics bit flags in
CIO Word n+17 to n+24. These bits indicate reception of new slave
diagnostics data.
Clearing the bit flags provides a clear indication for new messages to
arrive.
OFF Unit If the bit flags have been cleared, the Unit will reset this bit to OFF.
09
to
15
Reserved by sys-
tem
--- --- These bits are ignored in the Unit. If set, they will immediately be set to
OFF by the Unit.
Bit Name Status Controlled
by
Unit operation