Page 10 of catalogue Bus, identification and control systems of ifm Electronic GmbH

General information

Notes and explanations

General introduction

Master profiles Different profiles characterising performance have been defined for AS-i masters. For the further development of the slave functions the “new” functions have also been integrated in the master profiles. The following table shows the compatibility between master and slaves. The master profiles can be found in the data sheet.
Profile Functionality cyclical data exchange, only binary data, no extended addressing mode like M0, in addition analogue data and acyclical AS-i parameters cyclical data exchange and acyclical AS-i parameters like M1, complemented by the extended addressing mode (62 slaves), analogue protocols S-7.3x and S7.4 x. like M3, complemented by data protocols for byte transmission

M0 M1 M2 M3 M4

AS-i characteristics

Topology (wiring) Medium Signals Cable length Number of the slaves per line Useful data per slave Number of the binary I / O (cyclical) Analogue value processing Number of the analogue I / O (acyclical) Data transmission, parameter setting Number of the masters / lines Cycle time Access method Addressing Fault detection

tree structure, line, line with spurs, ring, star unscreened two-wire cable (e.g. H05VV-F2 x 1.5; AS-i flat cable) data and energy via one cable, max. 8 A 100 m, expansion via repeaters possible up to 62 slaves 4-bit data (cyclical, 4-bit parameters (acyclical), 4 bits with data protocol (multiplex) 124 I / O (single slaves), 248 I + 186 O (A / B slaves) channels possible via the slave profile S 7.3 124 words several bytes, unidirectional / bidirectional optional via multimaster, controller or gateway 5...10 ms cyclical polling, single-master system permanent, clear address in the slave identification and repetition of corrupted messages Due to the safe unscreened data transmission AS-i can transfer signals even via slip rings.

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