Omron CJ1W-CORT21 Operation Manual page 89

2 On response code 0000, the unit will set to zero:
• The Receive Message buffers that are added to the configuration
• The Receive Trigger bits that are added to the configuration (the Send Trigger bits are not
cleared)
 Send Trigger Area
Every bit in this area can be a trigger to send a CAN message located in the send buffer area. The
bit is only a send trigger if:
• a corresponding send buffer is defined for the bit
• the send mode SM1 is part of the total send mode for the send buffer
• the bit has a rising edge transition (OFF to ON)
The words in this memory area are controlled by both the CPU and/or the Unit.
Controlled By
CPU
User Defined
CAN Unit
The location R of the send trigger words is configured with the command code 2902. The length of
the area is determined via the number of configured send message buffers. If the number of config-
ured send message buffers is A, the length L is:
The result is rounded down to the nearest whole number and remaining trigger bits will be ignored.
The send trigger area table has the following layout:
Word
R 15 14
R+1 31 30
~
R+L 16*L 16*L
+15 +14
 Receive Trigger Area
This area has flags indicating that a CAN message is received in the receive buffer corresponding to
the receive bit. Every input message buffer has its corresponding bit. The bit value means:
ON = An input message with the configured message identifier of this input message buffer has
been received since last Unit Cyclic refresh.
OFF = No input message with the configured message identifier of this input message buffer has
been received since last cyclic refresh or the message has been discarded due to receive queue
overflow (*_RcvOver is ON).
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
Action
Bit Set In mode SM1 (output messages are sent by triggering a bit in trigger
send area table). After the next Unit Cyclic refresh, the unit will send
the corresponding message.
In other modes: no function.
Bit Reset Unspecified functionality: the corresponding message may send or
not send.
Bit Set The unit shall not set bits in this area.
Bit Reset In mode SM1 (output messages are sent by triggering a bit in trigger
send area table). The unit indicates that the corresponding message
has been sent by clearing the send bit in the send area table.
In other modes: the unit shall not reset the bit.
L
=
13 12 11 10 09
29 28 27 26 25
16*L 16*L 16*L 16*L 16*L
+13 +12 +11 +10 +09
4 Message Communications
Function
( )
A 15
+
-------------------- -
16
Bit
08 07 06 05
24 23 22 21
16*L 16*L 16*L 16*L
+08 +07 +06 +05
04 30 02 01 00
20 19 18 17 16
16*L 16*L 16*L 16*L 16*L
+04 +03 +02 +01 +00
4
4-7