User`s manual

337
CHAPTER 14 DATA COMMUNICATIONS USING EXTERNAL DEVICE AND PROGRAMMABLE CONTROLLER CPU M : N
CONFIGURATION
14
14.2 External Devices Interlock Conditions
14.2.2 Message structure when communicating data between
external devices
The message structure when communicating data between external devices is determined by any of the following.
This condition is determined to provide interlocks between the external devices so that each of them can exchange
data with the programmable controller CPU in a 1:1 configuration.
(1) When making the message structure the same as that of each control
procedure format frame
(a) Use a number within the [0] to [31] (00H to 1FH) range not set to the Q series C24 on
the programmable controller CPU side as the external device No. in the [Station No.]
and [Local station No.] items in the message.
(b) Select and designate the external device numbers.
The designation method is described in the MELSEC Communication Protocol Reference Manual.
• Station No.: Designates the No. of the transmit destination external device.
• Local station No.: Designates the No. of the transmit source external device. (Does not have to be
designated when A compatible 1C frame is used.)
When m : n configuration is 5:27
The values in ( ) are the external device and the Q series C24 station numbers (decimal: hexadecimal)
CPU C24CPU
(2: 02H)
(27: 1BH)
C24
(0: 00H) (1: 01H)
(28: 1CH)
(3: 03H) (26: 1AH)
(31: 1FH)
CPU C24
-1- -2- -5-
CPU C24CPU C24
C24: Q series C24, QC24(N), UC24
External
device
External
device
External
device
46H 39H 31H 43H 30H 30H 31H 42H46H05H 46H
H
F
L
9
H
1
L
C
H
0
L
0
H
F
L
F
H
1
L
B
E
N
Q
(QnA Compatible 3C frame format 1)
Frame identification No. Station No. Network No. PC No. Local station No.