Chapter 5 Relay Ladder Logic Programming 93
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7BReal Time Clock (RTC) Instructions
The iSmart 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 iSmart is set using the
Operation» RTC Set menu selection from the SMT Client software.
R
TC 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.
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 days
④
RTC displays the hour of present time.
⑤
RTC displays the minute of present time
⑥
⑦
⑧
⑨
⑩
RTC Coil Number (R01~R1F Total: 31 RTC)