FS-8700-02 Modbus Plus

Driver Manual

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

The node detects the network token being passed

seconds

among other nodes, but it never receives the

 

token.

Three flashes, then OFF for

The node does not detect any token passing on the

1.7 seconds

network.

Four flashes, then OFF for

The node has detected another node using the

1.4 seconds

same address.

FieldServer Technologies 1991 Tarob Court, Milpitas, California 95035 (408) 262-2299 fax: (408) 262-9042

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FieldServer FS-8700-02 instruction manual Address Switches, Modbus Plus Card Indicators