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4. Transmission specifications
4-1
4.1.1 Transmission specifications of Fnet master module
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Table 4.1.1 Transmission specifications of Fnet master module
Item Specification
Transmission speed
1Mbps
common in Fnet module
Encoding type Manchester Biphase-L
Transmission distance
(per segment)
Max. 750m
Transmission distance
(during using repeater)
Max. 750m
×
(6 repeater + 1) = 5.25 km
Electric
Transmission line Twisted pair shielded cable
Transmission distance
(per segment)
Max. 3km
Transmission distance
(during using EOC)
Max. 3km
×
(6 EOC +1) = 21km
Optical
Transmission line Optical cable
Max. number of station connection
Master + slave = 64 station
(At least one master should be connected)
Max. size of protocol 256 byte
Access type of
communication right
Circulated token passing
Communication type
Connection oriented service
Connectionless service
Frame error check CRC 16 = X
15
+ X
14
+ X
13
+ ... + X
2
+ X + 1
4.1 Transmission specifications of Fnet