Honeywell HC900 Reference Guide

Function Blocks
RTC Real Time Clock Function Block
328 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
RTC Real Time Clock Function Block
Description
The RTC label stands for Real Time Clock.
This block is part of the
Counters/Timers category.
Function
The Real Time Clock block provides outputs pins that you can access in your configuration to make
decisions based on the value of the controller’s Real Time Clock value.
The RTC function block has the following dynamic outputs based on the value of the real time clock of the
controller:
Seconds, Minutes, Hours, Day of Week, Day of Month, Day of Year, Month, Year.
Example
H
Figure 89 shows a function block diagram using a RTC function block.

Honeywell HC900 Specifications

General

Series	HC900
Redundancy	Optional
Programming Language	Function Block Diagram, Ladder Logic, Structured Text
Inputs	Analog, Digital
Outputs	Analog, Digital, Relay
Display	Optional
Control	PID, Advanced Control
Power Supply	24V DC or 100-240V AC
Storage Temperature	-40°C to 85°C
Humidity	5% to 95% non-condensing
Communication Protocols	Modbus, Ethernet