Chapter 5 Relay Ladder Logic Programming 90
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7BReal Time Clock (RTC) Instructions
The SG2 smart relay includes 31 RTC coils 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.
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 among the numbered block diagram for a Mode 0 RTC, the ladder diagram view, and the software Edit
Contact/Coil dialog box.
Symbol Description
①
Input the first week to RTC
②
Input the second week to RTC
③
RTC mode 0~2, 0: internal coil 1:daily, 2:consecutive day
④
RTC displays the hour of present time.
⑤
RTC displays the minute of present time
⑥
Set RTC hour ON
⑦
Set RTC Minute ON
⑧
Set RTC Hour OFF
⑨
Set RTC Minute OFF
⑩
RTC Coil Number (R01~R1F Total: 31 RTC)
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