Panasonic MINAS A5-series Operating Instructions Manual page 318

2. Absolute system
Transferring external scale absolute data
External scale RS485 communication procedure
Refer to the instruction manual of the host for the transmission/reception method of com-
mand. Following shows the communication example of the driver to Pr5.31 "Axis address
= 1".
Transmission starts
Host requests
for absolute
data to driver
80h transmission
04h transmission
Host receives
absolute data
from driver
06h transmission
transmission finishes
Command from the host will be transmitted to the desired driver based on RS485 trans-
mission protocol. For details of communication, refer to P.7-27, "Communication".
• Allow 50ms or longer interval for axis switching when you want to cap-
Caution
ture multiple axes data.
• It is recommended for you to repeat the above communication more
than 2 times to confirm the absolute data coincide, in order to avoid
mis-operation due to unexpected noise.
7-22
81h transmission *1
05h transmission
N
*1
81h reception
04h reception
Y
00h transmission
01h transmission
*2
C2h transmission
3Dh transmission
*3
N
06h reception
Y
N
80h reception
05h reception
Y
Reception of
absolute data
(15 characters)
N
Check sum
OK'ed reception
Y
15h transmission
Data of *1, *2 and *3are determined by the setup of
Pr5.31 "Axis address" of the front panel.
Axis
address Data of *1
(example)
0 Details of parameter
1 81h
2 82h
3 83h
4 84h
5 85h
6 86h
7 87h
8 88h
9 89h
10 8Ah
11 8Bh
12 8Ch
13 8Dh
14 8Eh
15 8Fh
16 90h
17 91h
18 92h
19 93h
20 94h
21 95h
22 96h
23 97h
24 98h
25 99h
26 9Ah
27 9Bh
28 9Ch
29 9Dh
30 9Eh
31 9Fh
Check sum becomes OK'ed when the lower 8-bit of the
sum of the received absolute data (15 characters) is 0.
Data of *2 Data of *3
01h 3Dh
02h 3Ch
03h 3Bh
04h 3Ah
05h 39h
06h 38h
07h 37h
08h 36h
09h 35h
0Ah 34h
0Bh 33h
0Ch 32h
0Dh 31h
0Eh 30h
0Fh 2Fh
10h 2Eh
11h 2Dh
12h 2Ch
13h 2Bh
14h 2Ah
15h 29h
16h 28h
17h 27h
18h 26h
19h 25h
1Ah 24h
1Bh 23h
1Ch 22h
1Dh 21h
1Eh 20h
1Fh 1Fh