Siemens Simatic S7-300, Инструкция по установке и эксплуатации

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Addressing and installation
4.3 Assigning the PROFIsafe address
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
37
Addressing rules
WARNING
Rule for PROFIBUS subnets:
The PROFIsafe destination address and, thus, the switch setting on the address switch of
the F-I/O must be unique network-wide* and station-wide** (system-wide). For S7-300 F-
SMs and ET 200S, ET 200eco and ET 200pro F-modules, you can assign a maximum of
1022 different PROFIsafe destination addresses.
Exception: The F-I/O in different I-slaves may be assigned the same PROFIsafe destination
address, as they are only addressed within the station, that is, by the F-CPU in the I-slave.
Rules for Ethernet subnets and hybrid configurations of PROFIBUS and Ethernet subnets:
The PROFIsafe destination address and, thus, the address switch setting on the F-I/O have
to be unique only*** within the Ethernet subnet, including all lower-level PROFIBUS
subnets, and station-wide** (system-wide). For S7-300 F-SMs and ET 200S, ET 200eco
and ET 200pro F-modules, you can assign a maximum of 1022 different PROFIsafe
destination addresses.
Exception: The F-I/O in different I-slaves may be assigned the same PROFIsafe destination
address, as they are only addressed within the station, that is, by the F-CPU in the I-slave.
The networked nodes of an Ethernet subnet are characterized by having IP addresses with
the same subnet address, which means the IP addresses match in the digits that have the
value "1" in the subnet mask.
Example:
IP address: 140.80.0.2.
Subnet mask: 255.255.0.0 = 11111111.11111111.00000000.00000000
Meaning: Bytes 1 and 2 of the IP address define the subnet; subnet address = 140.80.
* A network consists of one or several subnets. "Network-wide" means beyond the
boundaries of the subnet.
** "Station-wide" means for one station in
HW Config (for example, an S7-300 station or I-
slave)
*** Across Ethernet subnets, excluding cyclic PROFINET IO communication (RT
communication)
Address inconsistency
A parameter assignment error is generated if addressing is inconsistent, for example, if the
module address differs from the address set in
HW Config. The module does not enter
safety mode.
See also
Addressing the Channels (Page 33)