Eaton IQ 150S, Руководство пользователя и инструкция по установке

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IM02601006E www.eaton.com C-2
IQ 150S C: DNP Map
C.3: Data Link Layer
The Data Link Layer for IQ 150S meters is subject to the following considerations:
Control Field
The Control Byte contains several bits and a Function Code.
Control Bits
Communication directed to the meter should be Primary Master messages (DIR = 1, PRM = 1).
Response will be primary Non-Master messages (DIR = 0, PRM = 1). Acknowledgment will be
Secondary Non-Master messages (DIR = 0, PRM = 0).
Function Codes
IQ 150S meters support all of the Function Codes for DNP 3.0.
Reset of Data Link (Function 0)
Before confirmed communication with a master device, the Data Link Layer must be reset. This is
necessary after a meter has been restarted, either by applying power to the meter or reprogram-
ming the meter. The meter must receive a RESET command before confirmed communication can
take place. Unconfirmed communication is always possible and does not require a RESET.
User Data (Function 3)
After receiving a request for USER DATA, the meter generates a Data Link
CONFIRMATION, signaling the reception of the request, before the actual request is processed. If
a response is required, it is also sent as UNCONFIRMED USER DATA.
Unconfirmed User Data (Function 4)
After receiving a request for UNCONFIRMED USER DATA, if a response is required, it is sent as
UNCONFIRMED USER DATA.
Address
DNP 3.0 allows for addresses from 0 - 65534 (0x0000 - 0xFFFE) for individual device identifica-
tion, with the address 65535 (0xFFFF) defined as an all stations address. IQ 150S/250S meters'
addresses are programmable from 0 - 247 (0x0000 - 0x00F7), and address 65535 (0xFFFF) is
recognized as the all stations address.