MASI65-M12 User's manual
14 V 1.1
2.2 System data
Topology Tree structure
Transfer medium Two-wire cable (non-screened) for data and power (up to 8A)
Cable length Sum of all lines of derivation: max. 100 m
Number of slaves Max. 31 or max. 62
Number of binary ele-
ments (according to the
specification 2.0)
Up to 4 sensors and actuators per slave (max. 124, bidirectional max.
248 for a complete system)
Number of binary ele-
ments (according to the
specification 2.1)
Up to 4 sensors and 3 actuators per slave (max. 248 inputs and 186
outputs for a complete system)
Addresses A specific address for each slave between 1...31
or 1-31 A and 1-31 B (extended specification).
Addressing mode By means of a manual addressing device or via the master.
Messages Cyclic messages from the master to the individual slaves (master call)
with instant reply from slave (slave reply).
Bit rate 4 bits of informative data per slave and message.
Data cycle time 5 ms with 31 slaves
10 ms with 62 slaves.
Error recognition Identification of faulty messages, automatic repeat.
Master functions - System initialization
- Automatic slave detection
- Non-cyclical parameter transmission
- Bus and slave diagnosis
- Error messages to control
- Automatic addressing when a slave is replaced.
Table 2.2–1 : AS-Interface system data
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