Programming Guide
11.7 Multiple Units (RS485 Multidrop Mode)
Up to 32 units can be connected within a RS485 network, see section
5.6Installing of Multiple Sensors via RS485 on page 31. To direct a command to one unit among the 32 possible, it is necessary to „address“ a command. Therefore, a 3‐digit number is set prior the command. The 3‐digit number is determined between 001 and 032. Exception: Broadcast command.
If a command is transferred, starting with the 3‐digit number 000, all units (with addresses from 001 to 032) connected will get this command – without to send an answer.
Note: A unit with the address 000 is a single unit and not in multidrop mode.
XA=024 will set address to 24 (unit must not be in multidrop mode)
Changing an address:
(e.g. the address is change from 24 to 17)
command | answer |
„017?E“ | „017E0.950“ |
„017XA=024“ | “017XA024” setting of a new address |
„024?E“ | „024E0.950“ |
Example for the broadcast command: | |
command | answer |
“024?E” | “024E0.950” |
“000E=0.5” | will be executed from all units, no answer |
“024?E” | “024E0.500” |
“012?E” | “012E0.500” |
76 | MI |
