WEG MVW3000 A0040 V023, Руководство пользователя, Страница: 102 / 125

9-14 | MVW3000
9
Communication Networks
9-14 | MVW3000
„
PLC controlling the operation of an inverter in an industrial process.
Description of the Interfaces
The physical connection between the inverters and the network master is performed according to one of the
standards below:
1. RS-232 (point-to-point, up to 10 m).
2. RS-485 (multipoint, galvanic isolation, up to 1000 m).
RS-485
This interface allows the connection of up to 30 inverters to a master (PC, PLC, etc.), attributing to each inverter an
address (1 to 30) that must be set at each one. In addition to these 30 addresses, there are two other addresses
available to perform special tasks:
Address 0: any inverter in the network is inquired, regardless of its address. Only one inverter must be connected
to the network (point-to-point) in order to prevent short-circuits in the interface lines.
Address 31: um command can be transmitted simultaneously to all the inverters in the network, without acceptance
acknowledgment.
List of the addresses and the correspondent ASCII characters:
Table 9.6: ASCII characters
ADDRESS
(P0308)
ASCII
CHAR DEC HEX
0 @ 64 40
1 A 65 41
2 B 66 42
3 C 67 43
4 D 68 44
5 E 69 45
6 F 70 46
7 G 71 47
8 H 72 48
9 I 73 49
10 J 74 4A
11 K 75 4B
12 L 76 4C
13 M 77 4D
14 N 78 4E
15 O 79 4F
16 P 80 50
17 Q 81 51
18 R 82 52
19 S 83 53
20 T 84 54
21 U 85 55
22 V 86 56
23 W 87 57
24 X 88 58
25 Y 89 59
26 Z 90 5A
27 ] 91 5B
28 \ 92 5C
29 [ 93 5D
30 ^ 94 5E
31 _ 95 5F
Other ASCII characters used by the protocol: