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S7-300 CPU 31x -- Configuring and programming communication -- Using communication blocks

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How great is data consistency in the PUT and GET S7 communication functions for the individual S7-300 CPUs and C7 complete devices?

Part number:

Description:
In S7 communication with PUT and GET SFBs/FBs, data consistency is dependent on the individual servers (S7-300 CPU):

CPU Order no.
Consistent data (bytes), max.

S7-300

CPU 312 6ES7312-1AD10-0AB0 64

CPU 312C 6ES7312-5BD01-0AB0 64

CPU 313C 6ES7313-5BE01-0AB0 64

CPU 313C-2DP 6ES7313-6CE01-0AB0 64

CPU 313C-2PtP 6ES7313-6BE01-0AB0 64

CPU 314-2DP 6ES7314-1AF10-0AB0 64

CPU 314C-2DP 6ES7314-6CF01-0AB0 64

CPU 314C-2PtP 6ES7314-6BF01-0AB0 64

CPU 315-2DP 6ES7315-2AG10-0AB0 64

CPU 316-2DP 6ES7316-2AG00-0AB0 64

CPU 317-2DP 6ES7317-2AJ10-0AB0 160

CPU 317-2PN/DP 6ES7317-2EJ10-0AB0 160

CPU 319-3PN/DP 6ES7319-3EL10-0AB0 160
Table 1: Overview of the consistency ranges

Note:
In S7-300 CPUs with an older order no. and C7 devices the maximum data consistency is 32 bytes.

You can find further information:

In the STEP 7 online help, 'Common parameters of the SFBs/FBs and of the SFC/FC for S7 communication')
In the "System software for S7-300/400 system and standard functions" manual, Entry ID 1214574:
This contains a block-oriented overview of S7 communication and data consistency (Chap. 20). "Common parameters of the SFBs/FBs and of the SFC/FC for S7 communication" are described in Chap. 20.1.

Entry ID:17212854

Date:2006-06-26

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