### BACnet Time Clock with TLO and Override Status NOTE A control program with this microblock works only with v5.5 or later systems and v5.5 or later drivers. This microblock cannot be used in a control program for a Room Controller, S6104, UNI, or M line controller. The information below provides a FULL description of this microblock and all of its properties. What information you see and what you can do with it depends on your license and the application you are in, and in some cases, a controller's driver version.
Microblock family | Control microblocks
Icon and symbol |
What it does | This microblock reads schedules from the WebCTRL® or Field Assistant system and generates signals to tell the control program whether or not the zone is occupied and how long the zone will remain in its current state. The microblock has two outputs: the occ output, which indicates whether the zone is currently occupied (on) or unoccupied (off); and the timer output, which indicates the number of minutes remaining until the occupancy changes. The value of these outputs depends on the schedule entered for the control program in the WebCTRL® or Field Assistant system. This microblock can optionally accept an override signal that indicates the number of minutes to override occupancy from either of the following: A sensor if Enable Rnet is selected. Another microblock if Timed Local Override on the Optional tab is selected. This microblock can also indicate when the zone is in an override state using the optional Override Status (ovr) output. The ovr output will be active only when the equipment is in a true override condition and works for overriding in an On state or an Off state, as with the Force Unoccupied feature. If an occupied schedule is running when a user starts a timed local override, the ovr output will not turn on until the schedule expires. You cannot set schedules using the microblock's dialog box. The Properties page > Summary tab shows the current occupancy status of the zone, the time when the occupancy is scheduled to change, and the override status. The Properties page > Details tab shows the override time remaining, which may be different than the time remaining amount.
Click for details below Limitations Properties Alarms Rnet Optional Simulation
#### Limitations A control program with this microblock works only with v5.5 or later WebCTRL® systems and v5.5 or later drivers. This microblock cannot be used in a control program for an S6104 or a UNI. For these controllers, use one of the retired time clock microblocks.
#### Properties TIPS Alt+click any value in the WebCTRL® or Field Assistant interface to view property details, including its editing privilege and expression (location path) for use on graphics. You can right-click some properties in the EIKON® Property Editor and select Make editable or Make read-only to determine that property's functionality in your system.
Display Name | The microblock label used in the EIKON® application and the WebCTRL® interface. You can use any characters except the " character.
Reference Name RefName | Use the default reference name unless you want a more descriptive name for graphics or network links. Limitations: lower case only limited to 40 characters cannot begin with a number must be unique within a control program
Description | (optional) A BACnet-visible microblock description.
Lock Present Value | Check to output the locked value from the microblock instead of the microblock's calculated value.
Editing Privilege | Preset - Each microblock property has an appropriate privilege or role assigned to it. You can use Global Modify in the WebCTRL® interface to find out what the actual privilege is. CAUTION If you change the Editing Privilege from Preset, the privilege you select will be used for all properties of this microblock, which is not always desirable.
Schedule Category | The category of the schedule that will run the controlled equipment. Select Occupancy unless you have defined a custom schedule category in the EIKON® and WebCTRL® applications.
Unscheduled Value | The value the microblock assumes when no schedule has been downloaded to the program if: The system has no schedules that affect the equipment. A stand alone controller is powered up but no schedule data has been entered.
Configuration
Active Text | The Active Text your system displays when the microblock's output is on, or true.
Inactive Text | The Inactive Text your system displays when the microblock's output is off, or false.
Minimum off time | The minimum period (seconds) that the microblock's present value will be off, regardless of the input signal to the microblock.
Minimum on time | The minimum period (seconds) that the microblock's present value will be on, regardless of the input signal to the microblock.
Property Page Text
Show Property Page Text | Check to show this microblock's value on the equipment's Properties page.
Property Page Text | You can edit the microblock description that appears on the Properties page. See "Editing Properties page text using special characters" and "Formatting a microblock property" in EIKON® Help.
BACnet Configuration
Network Visible | Check to allow other BACnet equipment to read or change the microblock's present value. Must be checked for this microblock to generate alarms.
Object Instance | Auto-assign - A BACnet Object ID is assigned by the system. Use specific value - (0–3999999) Assign a number that is unique within the controller.
#### Alarms
Potential alarm source | Check to make this microblock available in the system's Alarm Sources list.
Critical | Determines the color of the system-wide alarm button when the alarm comes in if the alarm's Template field is set to Universal. = Critical = Non-critical
Category | The category you want to use to filter this microblock's alarms on the system's Alarms page > View tab.
Template | Universal - Allows your system to use the Alarm text and Return text defined in the microblock, and the Critical checkbox to determine the color of the system-wide alarm button when the alarm comes in.
Alarm
Alarm Enabled | Check to send a message when this microblock indicates an alarm condition.
Delay Seconds | The time the microblock's present value must remain in an alarm condition before the microblock sends an alarm.
Alarm text | The message displayed on the WebCTRL® Alarms page > View tab when an alarm condition occurs. A relative path is useful for alarm messages that you will reuse in multiple WebCTRL® locations because the path is relative to the item that contains the path.
Alarm requires acknowledge | Check to require that an operator acknowledge alarm notifications on the system's Alarms page > View tab.
Return to Normal
Return Enabled | Check to send a message when an alarm condition has returned to normal.
Return text | The message displayed on the WebCTRL® Alarms page > View tab when an alarm condition returns to normal. A relative path is useful for alarm messages that you will reuse in multiple WebCTRL® locations because the path is relative to the item that contains the path.
Return requires acknowledge | Check to require that an operator acknowledge return-to-normal notifications on the system's Alarms page > View tab.
Fault
Fault Enabled | Check to send a message when a fault condition occurs, such as a misconfigured or non-existent sensor.
#### Rnet
Enable Rnet | Check to allow this microblock to communicate its value(s) to and from a sensor.
Allow 'Continuous' Override | Check to allow a user to force a zone into an occupied state for an indefinite amount of time. The override remains in effect until the schedule transitions to occupied or until a user manually clears it by pressing the sensor's On/Off button twice.
Allow Force Unoccupied | Check to allow a user to save energy by forcing the zone into an unoccupied state. To force unoccupied, a user holds a ZS sensor's On/Off button for at least 3 seconds. This forced state remains in effect until the schedule transitions to unoccupied or until a user presses the sensor's On/Off button.
Force Unoccupied without Delay | Check to allow a user to force a zone to unoccupied immediately instead of the normal 3-second delay. NOTE This feature is unavailable if Allow TLO Set During Occupied is checked.
Allow TLO Set During Occupied | Check to allow a user to activate a timed local override while the zone is scheduled occupied. This allows a user to extend the zone's occupied time without the HVAC equipment having to go unoccupied first. NOTE This feature is unavailable if Force Unoccupied without Delay is checked.
Timed Local Override
Increment | Minutes the microblock adds to the zone's occupied time for each press of the zone's local override button or switch.
Maximum Duration | Maximum value (up to 960 minutes) the microblock outputs regardless of additional pulses from the controller's input.
Show scheduling limits: | The default limits for the Occupancy schedule category. NOTES A schedule download will fail if you exceed these limits when creating schedules. Changing these properties erases the schedule information in the controller, requiring you to download schedules again. If you use Global Modify to change these limits, the affected devices will not be automatically marked for schedule download.
Weekly Schedules - Max Transitions Per Day | The number of transitions a weekly schedule allows in a 24-hour period. The default is 6, which creates 5 schedule segments.
Max Exception Schedules | The number of non-weekly schedules allowed in a controller. The default is 30. The system reserves 7 of these schedules - one for each day of the week.
Max Transitions Per Day | The number of transitions a non-weekly schedule allows in a 24-hour period. The default is 6, which creates 5 schedule segments.
#### Optional
Timed Local Override | Use for an RS or LogiStat sensor or any other microblock that reads a TLO signal. Typically, for a ZS sensor, you should use the TLO options on the Rnet tab. However, if you do use this TLO input for a ZS sensor, it is in conjunction with the sensor's built-in TLO function. This microblock uses whichever TLO value is greater, the one from the sensor or the one from the optional input. This optional TLO input does not count down automatically.
Override Status | The ovr output will be On while either of the following conditions exists: The schedule is unoccupied and the override time remaining from the ovr input or ZS sensor is greater than 0. The schedule is occupied and the microblock gets a force unoccupied signal from a ZS sensor.
Allow for External Scheduling | This checkbox produces two binary inputs on the schedule microblock to allow the zone to be optionally scheduled by an external source like a binary input or third-party front-end via a binary value parameter. The ext input tells the schedule microblock to use the external schedule. The cmd input tells the schedule microblock to be either occupied (on) or unoccupied (off). When external scheduling is used, the user still has the option of using the ZS sensor for override or for forcing it into an unoccupied state.
#### Simulation Define the value(s) the microblock will use when you simulate the control program.