03/03
Features and Functions
CP 243-1 IT
J31069-D0429-U001-A0-7618
17
2.2
S7 Communication via Industrial Ethernet
2.2.1 Preliminary
Comments
S7 communication via Industrial Ethernet permits program-controlled communica-
tion via communication SFBs/FBs and configured S7 connections. The CP 243-1
IT supports S7 communication via Industrial Ethernet with the XPUT/XGET and
READ/WRITE services. Up to 212 bytes of user data can generally be transmitted
per job. If the CP 243-1 IT is run as server, up to 222 bytes of user data can even
be transferred in read jobs.
The CP 243-1 IT supports a maximum of eight S7 communication channels to cli-
ents or servers on one or more geographically removed communication partners.
The CP 243-1 IT works on the client/serve principle for each channel. Only one job
at a time per channel is accepted, processed and answered with a positive or
negative response. Not until a response has been sent does the CP 243-1 IT ac-
cept a new job.
If the CP 243-1 IT receives several jobs on a channel configured as server, only
the first job is processed. The subsequent jobs are ignored until the end of the
transaction (i.e., until a response is sent). The CP 243-1 IT has no channel-specific
job administration and does not buffer jobs.
Prerequisites for communication with a PC/PG
As before, a PG/PC can access the S7-200 CPU via the PPI interface. In addition,
this access may take place via the CP 243-1 IT via Ethernet. The following prereq-
uisites must be fulfilled for this.
•
An Ethernet card is installed and configured on the PG/PC and an Ethernet or
TCP/IP connection to the CP 243-1 IT exists (via routers, firewalls, and so on).
•
STEP 7 Micro/WIN 32 (starting with version 3.2.3) is installed on the PG/PC.
•
The CP 243-1 IT has a valid address. This address may be permanently speci-
fied in the configuration or obtained from a BOOTP server.
At this time, only one STEP 7 Micro/WIN 32 can communicate via a CP 243-1 IT
with the S7-200 CPU. Use of the Ethernet interface is mandatory for configuration
of the IT services.
Содержание CP 243-1 IT
Страница 46: ...Installation and Commissioning 03 03 CP 243 1 IT J31069 D0429 U001 A0 7618 46 ...
Страница 94: ...Programming 03 03 CP 243 1 IT J31069 D0429 U001 A0 7618 94 ...
Страница 106: ...Diagnosis 03 03 CP 243 1 IT J31069 D0429 U001 A0 7618 106 ...
Страница 120: ...Technical Data 03 03 CP 243 1 IT J31069 D0429 U001 A0 7618 120 ...
Страница 130: ...Example 03 03 CP 243 1 IT J31069 D0429 U001 A0 7618 130 ...