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Using the Automatic Clock Adjustment Function Section 5-2
5-1-2 Specifications
5-2 Using the Automatic Clock Adjustment Function
5-2-1 Procedure
Item Specification
Protocol SNTP
Port number 123 (UDP)
Can also be set from the CX-Programmer in the Unit Setup.
Adjustment timing Automatic (fixed time) and manual (manual only cannot be
set)
Access to SNTP
server
Writes the clock information
from the SNTP server to the
local CPU Unit.
Obtains the clock information
from the SNTP server set up
on the Network, and applies
the information obtained to
the local CPU Unit.
Refresh timing When the automatic clock adjustment switch is turned from
OFF to ON and at a specified time.
1. Make the basic settings.
Refer to SECTION 2 Installation and Initial Setup in the Ethernet Units Operation Man-
ual Construction of Networks (W420).
↓
2. With the CX-Programmer online, set the following items in the Unit Setup (CPU Unit
System Setup).
• SNTP server specification (required)
• Access to the SNTP server is enabled when writing clock information from the SNTP
server to the local CPU Unit when the Automatic Clock Adjustment Switch is turned
from OFF to ON and at a set automatic adjustment time.
• Automatic clock adjustment setting
↓
3. To perform automatic clock adjustment manually, turn the Automatic Clock Adjustment
Switch from OFF to ON.
n = CIO 1500 + (25
× unit number)
↓
4. Select Transfer to PLC from the Options Menu and click the Yes Button. The Unit
Setup (CPU Bus System Setup) will be transferred to the CPU Unit (the setting data will
be transferred to the CPU Bus Unit System Setup Area).