5/25/2016 3:30 PM | |
Joined: 9/27/2006 Last visit: 6/1/2024 Posts: 12259 Rating: (2670)
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Hello steven; Every As-I module sold on market comes with a factory-set address of 0. To operate on the As-I bus, the address must be changed to a unique address between 1 and 31 (extended addressing modules must be addresses between 1A and 31A or 1B and 32B). Some As-I masters have a finction that can attribute an address to a module that is inserted in the bus with address 0, but this functionality is limited (you generally cannot select the address, the lowest address available is imposed on the new module, which can cause addressing problems). Generally you must rely on a hand-held addressing unit for As-i. IFM proposes their addressing unit AC1154, as you can see in the attachment taken from the Operating instructions for the AC5205 (http://www.ifm.com/mounting/80226775UK.pdf). http://www.ifm.com/products/uk/ds/AC1154.htm Siemens also has one (so do other As-I manufacturers , see AS-interface.net/products); all As-i addressing units should be compatible, if they are certified. 3RK1904-2AB02AS-I ADDRESSING UNIT V3.0 Once the As-I module has received its unique address, it reserves 4 bits (a nibble) for this slave in the range of 16 words reserved for the As-I master, mapped on the address selected. The second part of the attachment shows how a Siemens As-I master distributes the slaves nibbles; all As-I masters map the As-I I/O modules in a similar fashion. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 5/25/2016 6:23:45 PM |
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11/6/2016 9:23 PM | |
Joined: 8/21/2014 Last visit: 5/24/2024 Posts: 959 Rating: (13) |
New question published by neto1100 is split to a separate thread with the subject Problem with mapping slaves using gateway AC1402. Best regards |
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