CV500BC051 Omron, CV500BC051 Datasheet - Page 205

• Manufacturer Part Number: CV500BC051
• Description: Programmable Logic Controller
• Manufacturer: Omron

Specifications of CV500BC051

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Indirect Designation of
Beginning Words
180
Introduction
CVM1, CV-series, and CS/CJ-series PLCs have a larger area than CQM1H-
series PLCs, so the beginning words for sending and receiving at destination
nodes cannot always be directly specified by means of SEND and RECV
operands. Moreover, depending on circumstances, it may be desirable to
change the beginning word at destination nodes.
In such cases, set the “Direct/Indirect” control data designation to “1” (Indi-
rect), and specify the beginning words for sending and receiving as described
below.
SEND
The beginning receive word is determined by the contents of the destination
node’s D and D+1 words.
RECV
The beginning send word is determined by the contents of the destination
node’s S and S+1 words.
using the message service, it is advisable to prevent this situation from oc-
curring by performing resend processing at the node where instructions
are issued. With the SEND, RECV, and CMND instructions, resend pro-
cessing is performed automatically once the number of retries has been
set, so be sure to specify a number other than “0” for the number of retries.
@SEND(90)
@RECV(98)
D
C
D
C
S
S
D+1
S
S+1
D
S: Source node beginning send word
D: Destination node beginning receive word
C: Source node first control data word
S: Source node beginning send word
D: Destination node beginning receive word
C: Source node first control data word
15141312 1110 9 8 7 6 5 4 3 2 1 0
151413121110 9 8 7 6 5 4 3 2 1 0
Area code*
Area code*
Word address (4th digit)
Word address (4th digit)
Word address (3rd digit)
Word address (3rd digit)
0 0 0 0
0 0 0 0
Word address (2nd digit)
Word address (2nd digit)
Word address (1st digit)
Word address (1st digit)
Word address (5th digit)
Word address (5th digit)
Section 6-1