Configuration in STEP 7
5.9 Configuring time-of-day synchronization
TIM DNP3
System Manual, 06/2014, C79000-G8976-C253-03
137
> WAN interface X > Properties > Node type) The time of day is sent by the master
station to the connected station TIMs or node stations. For information on configuration,
refer to the properties dialog of the WAN network, section Configuring WAN network
nodes (Page 102)
You configure the time-of-day synchronization of the TIM modules in the properties dialog of
the TIM > "Time Service" tab (Page 119).
The station TIM makes the time of day available to the local CPU in its I/O addresses. This
makes the time of day available to the assigned S7 CPU. You will find details in the section
Time-of-day synchronization of the S7-300 CPU (Page 137).
Time-of-day synchronization via the TIM in an S7-400
You will find a description of the procedure for a TIM as CP of the S7-300 and for the S7-400
in the section Time-of-day synchronization of an S7-400 CPU (Page 139).
Time-of-day synchronization using the CPU
Apart from the time of day synchronization of the station using the TIM, you can also
synchronize the time of day of the TIM with that of the CPU.
You will find a description of the procedure for an S7-300 and an S7-400 in the section
Synchronization of the TIM time of day by the CPU (Page 139).
Time-of-day synchronization of the S7-300 CPU
Time information provided by the TIM
The time-of-day synchronization of the TIM is configured in STEP 7 in the properties dialog
of the TIM, refer to the section "Time Service" tab (Page 119).
The function described below applies only if the TIM is installed as a CP in the S7-300 rack.
It does not apply to a stand-alone TIM.
The TIM in the S7-300 makes the time of day available to its local CPU in the I/O addresses.
The CPU user program can then read and evaluate the time there.
The I/O addresses of the CPU that makes the date and time information available to the TIM
are set in the properties dialog of the TIM, "Addresses" tab; refer to the section "Addresses"
tab (Page 118).
The time information of a time-synchronized TIM module with TD7onTIM is stored in 8 bytes
of the peripheral inputs. The time information has an offset of 8 bytes from the start value of
the inputs. The following table shows the assignment of the 8 bytes of time information.
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