FSP Technology Modbus Box User manual

1
Modbus Box Quick Guide V.1.1
Thank you for purchasing Modbus box. This manual contains instructions and warnings that
should be followed during the installation, operating and storage of the card. Please keep this
manual for further reference.
Special Precautions
If the Modbus box must be stored prior to installation; storage must be in a dry place
The admissible storage temperature range is from -10ºC to +70ºC.
1. Product Overview
RS-232 port
RS-485 port
5V DC input
RS232 TXD LED
RS232 RXD LED
Power indicator
2. Product Introduction
The Modbus box provides inverter with the functionality of communication with PCs through
MODBUS protocol:
Implements MODBUS RTU protocol
Provides MODBUS functions including read Holding Registers and write Registers.
Provides RS485 interface
Provides surge protection

2
Modbus Box Quick Guide V.1.1
3. Installation and Operation
Follow below steps to install and use this modbus box:
1. Remove top case by removing screws. See below chart.
2. Configure Modbus ID (Refer to section 4.1 for the details).
3. Configure communication format (Refer to section 4.2 for the details).
4. Connect modbus box to inverter with RS232 cable.
5. Connect modbus box to RS-485 adapter with RJ45 cable.

3
Modbus Box Quick Guide V.1.1
4. Configuration
4.1 Machine ID Configuration
4.2 Communication Format Configuration
Function
Bit Setting
Meaning
Baud
rate
# 2
# 1
OFF
OFF
2400bps
OFF
ON
4800bps
ON
OFF
9600bps
ON
ON
19200bps(default)
Parity
check
# 4
# 3
OFF
OFF
Even parity
ON
OFF
Odd parity
OFF
ON
No parity check 1 stop bits
(Default)
ON
ON
No parity check 2 stop bits
There are eight bits to present ID of each card.
Use SW1 to set machine ID. From left to right, it’s
8 to 1. As shown, when the switch is pushed
down, the bit is set to “one”. Otherwise, the bit is
set as zero. The ID of modbus card is set to 0x01
as chart. Please check appendix for detailed ID no.
and SW1 setting.

4
Modbus Box Quick Guide V.1.1
4.3 RS-485 Resistance Configuration
4.4 Interface Configuration
RS-485 Pin Configuration
Pin
Function
4
RS-485 - B
5
RS-485 - A
8
GND
RS232 Pin Configuration:
Pin
Function
1
Txd
2
Rxd
8
GND
USB spec
Voltage
5V DC
Current
500 mA
USB port is used as input power source, not for communication purpose.
Function
Bit #
Setting
Meaning
Push up
resistance
# 6
ON
Enable (Default)
OFF
Disable
Push down
resistance
# 7
ON
Enable (Default)
OFF
Disable
Terminate
resistance
# 8
ON
Enable (Default)
OFF
Disable

5
Modbus Box Quick Guide V.1.1
4.5 Connection
First, please use one RS485 to RS 232 converter or RS-485 to Modbus/TCP converter as media
converter between Modbus card and computer. Please follow below chart for wiring connection
between RJ45 and media converter:
Wiring connection between RJ45 and media converter
APPENDIX: Machine ID Configuration Table (SW1) √=ON ×=OFF
SW1
ID
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
1
√
×
×
×
×
×
×
×
2
×
√
×
×
×
×
×
×
3
√
√
×
×
×
×
×
×
4
×
×
√
×
×
×
×
×
5
√
×
√
×
×
×
×
×
6
×
√
√
×
×
×
×
×
7
√
√
√
×
×
×
×
×
8
×
×
×
√
×
×
×
×
9
√
×
×
√
×
×
×
×
10
×
√
×
√
×
×
×
×
11
√
√
×
√
×
×
×
×
12
×
×
√
√
×
×
×
×
13
√
×
√
√
×
×
×
×
14
×
√
√
√
×
×
×
×
15
√
√
√
√
×
×
×
×
16
×
×
×
×
√
×
×
×
17
√
×
×
×
√
×
×
×
18
×
√
×
×
√
×
×
×
19
√
√
×
×
√
×
×
×
20
×
×
√
×
√
×
×
×

6
Modbus Box Quick Guide V.1.1
21
√
×
√
×
√
×
×
×
22
×
√
√
×
√
×
×
×
23
√
√
√
×
√
×
×
×
24
×
×
×
√
√
×
×
×
25
√
×
×
√
√
×
×
×
26
×
√
×
√
√
×
×
×
27
√
√
×
√
√
×
×
×
28
×
×
√
√
√
×
×
×
29
√
×
√
√
√
×
×
×
30
×
√
√
√
√
×
×
×
31
√
√
√
√
√
×
×
×
32
×
×
×
×
×
√
×
×
33
√
×
×
×
×
√
×
×
34
×
√
×
×
×
√
×
×
35
√
√
×
×
×
√
×
×
36
×
×
√
×
×
√
×
×
37
√
×
√
×
×
√
×
×
38
×
√
√
×
×
√
×
×
39
√
√
√
×
×
√
×
×
40
×
×
×
√
×
√
×
×
41
√
×
×
√
×
√
×
×
42
×
√
×
√
×
√
×
×
43
√
√
×
√
×
√
×
×
44
×
×
√
√
×
√
×
×
45
√
×
√
√
×
√
×
×
46
×
√
√
√
×
√
×
×
47
√
√
√
√
×
√
×
×
48
×
×
×
×
√
√
×
×
49
√
×
×
×
√
√
×
×
50
×
√
×
×
√
√
×
×
51
√
√
×
×
√
√
×
×
52
×
×
√
×
√
√
×
×
53
√
×
√
×
√
√
×
×
54
×
√
√
×
√
√
×
×
55
√
√
√
×
√
√
×
×
56
×
×
×
√
√
√
×
×
57
√
×
×
√
√
√
×
×
58
×
√
×
√
√
√
×
×
59
√
√
×
√
√
√
×
×
60
×
×
√
√
√
√
×
×
61
√
×
√
√
√
√
×
×
62
×
√
√
√
√
√
×
×

7
Modbus Box Quick Guide V.1.1
63
√
√
√
√
√
√
×
×
64
×
×
×
×
×
×
√
×
65
√
×
×
×
×
×
√
×
66
×
√
×
×
×
×
√
×
67
√
√
×
×
×
×
√
×
68
×
×
√
×
×
×
√
×
69
√
×
√
×
×
×
√
×
70
×
√
√
×
×
×
√
×
71
√
√
√
×
×
×
√
×
72
×
×
×
√
×
×
√
×
73
√
×
×
√
×
×
√
×
74
×
√
×
√
×
×
√
×
75
√
√
×
√
×
×
√
×
76
×
×
√
√
×
×
√
×
77
√
×
√
√
×
×
√
×
78
×
√
√
√
×
×
√
×
79
√
√
√
√
×
×
√
×
80
×
×
×
×
√
×
√
×
81
√
×
×
×
√
×
√
×
82
×
√
×
×
√
×
√
×
83
√
√
×
×
√
×
√
×
84
×
×
√
×
√
×
√
×
85
√
×
√
×
√
×
√
×
86
×
√
√
×
√
×
√
×
87
√
√
√
×
√
×
√
×
88
×
×
×
√
√
×
√
×
89
√
×
×
√
√
×
√
×
90
×
√
×
√
√
×
√
×
91
√
√
×
√
√
×
√
×
92
×
×
√
√
√
×
√
×
93
√
×
√
√
√
×
√
×
94
×
√
√
√
√
×
√
×
95
√
√
√
√
√
×
√
×
96
×
×
×
×
×
√
√
×
97
√
×
×
×
×
√
√
×
98
×
√
×
×
×
√
√
×
99
√
√
×
×
×
√
√
×
100
×
×
√
×
×
√
√
×
101
√
×
√
×
×
√
√
×
102
×
√
√
×
×
√
√
×
103
√
√
√
×
×
√
√
×
104
×
×
×
√
×
√
√
×

8
Modbus Box Quick Guide V.1.1
105
√
×
×
√
×
√
√
×
106
×
√
×
√
×
√
√
×
107
√
√
×
√
×
√
√
×
108
×
×
√
√
×
√
√
×
109
√
×
√
√
×
√
√
×
110
×
√
√
√
×
√
√
×
111
√
√
√
√
×
√
√
×
112
×
×
×
×
√
√
√
×
113
√
×
×
×
√
√
√
×
114
×
√
×
×
√
√
√
×
115
√
√
×
×
√
√
√
×
116
×
×
√
×
√
√
√
×
117
√
×
√
×
√
√
√
×
118
×
√
√
×
√
√
√
×
119
√
√
√
×
√
√
√
×
120
×
×
×
√
√
√
√
×
121
√
×
×
√
√
√
√
×
122
×
√
×
√
√
√
√
×
123
√
√
×
√
√
√
√
×
124
×
×
√
√
√
√
√
×
125
√
×
√
√
√
√
√
×
126
×
√
√
√
√
√
√
×
127
√
√
√
√
√
√
√
×
128
×
×
×
×
×
×
×
√
129
√
×
×
×
×
×
×
√
130
×
√
×
×
×
×
×
√
131
√
√
×
×
×
×
×
√
132
×
×
√
×
×
×
×
√
133
√
×
√
×
×
×
×
√
134
×
√
√
×
×
×
×
√
135
√
√
√
×
×
×
×
√
136
×
×
×
√
×
×
×
√
137
√
×
×
√
×
×
×
√
138
×
√
×
√
×
×
×
√
139
√
√
×
√
×
×
×
√
140
×
×
√
√
×
×
×
√
141
√
×
√
√
×
×
×
√
142
×
√
√
√
×
×
×
√
143
√
√
√
√
×
×
×
√
144
×
×
×
×
√
×
×
√
145
√
×
×
×
√
×
×
√
146
×
√
×
×
√
×
×
√

9
Modbus Box Quick Guide V.1.1
147
√
√
×
×
√
×
×
√
148
×
×
√
×
√
×
×
√
149
√
×
√
×
√
×
×
√
150
×
√
√
×
√
×
×
√
151
√
√
√
×
√
×
×
√
152
×
×
×
√
√
×
×
√
153
√
×
×
√
√
×
×
√
154
×
√
×
√
√
×
×
√
155
√
√
×
√
√
×
×
√
156
×
×
√
√
√
×
×
√
157
√
×
√
√
√
×
×
√
158
×
√
√
√
√
×
×
√
159
√
√
√
√
√
×
×
√
160
×
×
×
×
×
√
×
√
161
√
×
×
×
×
√
×
√
162
×
√
×
×
×
√
×
√
163
√
√
×
×
×
√
×
√
164
×
×
√
×
×
√
×
√
165
√
×
√
×
×
√
×
√
166
×
√
√
×
×
√
×
√
167
√
√
√
×
×
√
×
√
168
×
×
×
√
×
√
×
√
169
√
×
×
√
×
√
×
√
170
×
√
×
√
×
√
×
√
171
√
√
×
√
×
√
×
√
172
×
×
√
√
×
√
×
√
173
√
×
√
√
×
√
×
√
174
×
√
√
√
×
√
×
√
175
√
√
√
√
×
√
×
√
176
×
×
×
×
√
√
×
√
177
√
×
×
×
√
√
×
√
178
×
√
×
×
√
√
×
√
179
√
√
×
×
√
√
×
√
180
×
×
√
×
√
√
×
√
181
√
×
√
×
√
√
×
√
182
×
√
√
×
√
√
×
√
183
√
√
√
×
√
√
×
√
184
×
×
×
√
√
√
×
√
185
√
×
×
√
√
√
×
√
186
×
√
×
√
√
√
×
√
187
√
√
×
√
√
√
×
√
188
×
×
√
√
√
√
×
√

10
Modbus Box Quick Guide V.1.1
189
√
×
√
√
√
√
×
√
190
×
√
√
√
√
√
×
√
191
√
√
√
√
√
√
×
√
192
×
×
×
×
×
×
√
√
193
√
×
×
×
×
×
√
√
194
×
√
×
×
×
×
√
√
195
√
√
×
×
×
×
√
√
196
×
×
√
×
×
×
√
√
197
√
×
√
×
×
×
√
√
198
×
√
√
×
×
×
√
√
199
√
√
√
×
×
×
√
√
200
×
×
×
√
×
×
√
√
201
√
×
×
√
×
×
√
√
202
×
√
×
√
×
×
√
√
203
√
√
×
√
×
×
√
√
204
×
×
√
√
×
×
√
√
205
√
×
√
√
×
×
√
√
206
×
√
√
√
×
×
√
√
207
√
√
√
√
×
×
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√
208
×
×
×
×
√
×
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√
209
√
×
×
×
√
×
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√
210
×
√
×
×
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×
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√
211
√
√
×
×
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×
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√
212
×
×
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×
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×
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213
√
×
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×
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×
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214
×
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×
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×
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215
√
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×
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×
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216
×
×
×
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×
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217
√
×
×
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×
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218
×
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×
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×
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219
√
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×
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×
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220
×
×
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×
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221
√
×
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×
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222
×
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×
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223
√
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×
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224
×
×
×
×
×
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225
√
×
×
×
×
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226
×
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×
×
×
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227
√
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×
×
×
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228
×
×
√
×
×
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229
√
×
√
×
×
√
√
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230
×
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×
×
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√

11
Modbus Box Quick Guide V.1.1
231
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√
√
×
×
√
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√
232
×
×
×
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×
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233
√
×
×
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×
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234
×
√
×
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×
√
√
√
235
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√
×
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×
√
√
√
236
×
×
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√
×
√
√
√
237
√
×
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×
√
√
√
238
×
√
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√
×
√
√
√
239
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√
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√
×
√
√
√
240
×
×
×
×
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√
√
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241
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×
×
×
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√
√
√
242
×
√
×
×
√
√
√
√
243
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√
×
×
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√
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√
244
×
×
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×
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√
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245
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×
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×
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√
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246
×
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×
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247
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×
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√