Chapter 4 Relay Ladder Logic Programming 65
Real Time Clock (RTC) Instructions
The SG2 smart relay includes a total of 15 separate RTC instructions
that can be used throughout a program. Each RTC instruction has a
choice of 5 operation modes, and has 10 parameters for proper
configuration. The initial clock/calendar setting for each connected SG2
is set using the Operation»RTC Set menu selection from the SG2
Client software.
Symbol
Description
c
Input the first week to RTC
d
Input the second week to RTC
e
RTC mode 0~2, 0: internal coil 1:daily, 2:consecutive days
f
RTC displays the hour of present time.
g
RTC displays the minute of present time
h
Set RTC hour ON
i
Set RTC Minute ON
j
Set RTC Hour OFF
k
Set RTC Minute OFF
⑩
RTC Coil Number (R1~RF Total: 15 RTCs)
RTC Mode 0 (Internal Coil)
Mode 0 RTC (Internal Coil) used as internal
auxiliary coils. No preset value.
In the example below shows the relationship
between the numbered block diagram for a Mode 0
RTC, the ladder diagram view, and the software
Edit Contact/Coil dialog box.