Panasonic MINAS A5-series Operating Instructions Manual page 314

2. Absolute system
Transferring absolute data
RS485 Communication Protocol
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
81h transmission
05h transmission
81h reception
04h reception
Host requests
for absolute
00h transmission
data to driver
01h transmission
D2h transmission
2Dh transmission
06h reception
80h transmission
04h transmission
Host receives
absolute data
Reception of
from driver
absolute data
(15 characters)
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.
7-18
*1
N
*1
Y
*2
*3
N
Y
N
80h reception
05h reception
Y
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 not usable with RS485 communication
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 2Dh
02h 2Ch
03h 2Bh
04h 2Ah
05h 29h
06h 28h
07h 27h
08h 26h
09h 25h
0Ah 24h
0Bh 23h
0Ch 22h
0Dh 21h
0Eh 20h
0Fh 1Fh
10h 1Eh
11h 1Dh
12h 1Ch
13h 1Bh
14h 1Ah
15h 19h
16h 18h
17h 17h
18h 16h
19h 15h
1Ah 14h
1Bh 13h
1Ch 12h
1Dh 11h
1Eh 10h
1Fh 0Fh