FS-8700-02 Modbus Plus
Driver Manual
FieldServer Technologies 1991 Tarob Court, Milpitas, California 95035 (408) 262-2299 fax: (408) 262-9042
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Page 2
Address Switches 6--1
Address Switches 6--1
Address Switches 6--1
14
0 0 1 1 0 1
36
1 0 0 0 1 1
58
1 1 1 0 0 1
15
0 0 1 1 1 0
37
1 0 0 1 0 0
59
1 1 1 0 1 0
16
0 0 1 1 1 1
38
1 0 0 1 0 1
60
1 1 1 0 1 1
17
0 1 0 0 0 0
39
1 0 0 1 1 0
61
1 1 1 1 0 0
18
0 1 0 0 0 1
40
1 0 0 1 1 1
62
1 1 1 1 0 1
19
0 1 0 0 1 0
41
1 0 1 0 0 0
63
1 1 1 1 1 0
20
0 1 0 0 1 1
42
1 0 1 0 0 1
64
1 1 1 1 1 1
21
0 1 0 1 0 0
43
1 0 1 0 1 0
22
0 1 0 1 0 1
44
1 0 1 0 1 1
* = default
Table 2: Summary of Modbus Data Access Commands
Function Code (Decimal)
Command Name
1
Read Discrete Output Status (0xxxx)
2
Read Discrete Input Status (1xxxx)
3
Read Output Register (4xxxx)
4
Read Input Register (3xxxx)
5
Force Single Coil (0xxxx)
6
Preset Single Register (4xxxx)
15
Force Multiple Coils (0xxxx)
16
Preset Multiple Registers (4xxxx)
Modbus Plus Card Indicators
The Modbus Plus card has an indicator that flashes a repetitive pattern to show its network
communication status, plus two indicators which identify communication errors on the two
Modbus Plus cable paths. Note that one error indicator will be lit normally in single -cable
installations, showing that a second cable does not exist.
Table 3: Modbus Plus Active Indicator Patterns
Indicator Pattern (Green)
Status
Six flashes/second
Normal operating state. All nodes on a healthy
network flash this pattern
One flash/second
The node is off-line. After being in this state for 5
seconds, the node attempts to go to its normal
operating state.
Two flashes, then OFF for 2
seconds
The node detects the network token being passed
among other nodes, but it never receives the
token.
Three flashes, then OFF for
1.7 seconds
The node does not detect any token passing on the
network.
Four flashes, then OFF for
1.4 seconds
The node has detected another node using the
same address.
