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PROFIBUS-DP - Parameterization in DIGSI

SIPROTEC PROFIBUS-DP - Communication profile

C53000-L1840-B001-03

4.4 Time synchronization

The PROFIBUS-DP slave of the SIPROTEC devices can use time synchronization

messages via PROFIBUS System Management Service for time synchronization.

Preconditions:

• the PROFIBUS-DP master must be able to send time synchronization messages

and must have a corresponding parameterization,

• only one master station may send time messages in the PROFIBUS net,

• the evaluation of time synchronization messages in the PROFIBUS-DP slave is

enabled,

• PROFIBUS has to be selected for “Source of time synchronization” in the SIPRO-

TEC device.

4.4.1 PROFIBUS-DP master

The following PROFIBUS-DP masters can e.g. transmit time synchronization mes-

sages via PROFIBUS System Management Service:

• SIMATIC S7 CPU 412-2DP...CPU 416-2DP, CPU 414-3DP, CPU 416-3DP with

firmware from V3.0 respectively,

• SIMATIC S7 400 PLC Series with Communication Processor Module CP 443-5

Extended V2.0 or higher (6GK7 443-5DX02-...),

• WinCC Version 5 with Service Pack 2 or higher, Communication Processor Card

CP 5613 and WinCC Option Basic Process Control (BPC).

Parameterization A PLC S7-400 system with Communication Processor Module CP 443-5 Extended

and parameterization software STEP7 is used as an example for the parameterization

of a master station:

1. The CPU has to be defined as master for time synchronization.

Select the following settings in HW Config of STEP7 in the dialog window

Properties CPU 4xx (ref to Figure 4-8):

• Synchronization in the PLC: "As master"

• Time Interval: "1 minute", “10 seconds”

or “1 second”

• Correction Factor to compensate deviation of the master clock (if necessary).

2. The PROFIBUS-DP master (CP 443-5 Extended) has to be configured to relay the

time synchronization messages to the PROFIBUS-DP slaves.

Select the following settings in HW Config of STEP7 in the dialog window

Properties CP 443-5 Ext (ref. to Figure 4-9):

• Pass on time-of-day frames: "From station to LAN"

1 Time intervals of less than 1 minutes are supported with PROFIBUS-DP communica-

tion module firmware version 03.01.03 or higher, see notes on page 4-76.

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