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Flow Indication
| In order to allow the user to know when the greenhouse soil is being watered, the instrumentation software will provide a graphic showing the presence of flow. This indication will be programmed to occur when the valve is open. |
Project Overview
The schematic for the project is shown in figure 5. A table listing the various instruments and the control blocks used in the program follows:
Table of Instrument Tags and Control Blocks
Tag Name |
Description |
I/O Type |
Location |
| XT-001 TT-001 XI-001 TI-001 XALL-001 XAL-002 XS-001 XS-002 XS-003 XS-004 XS-005 FAH-001 FV-001 |
Humidity Transmitter Temperature Transmitter Humidity Indication Temperature Indication Alarm Low Low (Lt sensor #1) Alarm Low (Lt sensor #2) Switch (20w light) Switch (100w light) Switch (fan) Switch (heater) Switch (valve) Flow Alarm High Flow Valve |
Analog Input Analog Input Control Block (Input) Control Block (Input) Control Block (Input) Control Block (Input) Control Block (Output) Control Block (Output) Control Block (Output) Control Block (Output) Control Block (Output) Control Block (N/A) N/A |
Field Field Control Room Control Room Control Room Control Room Control Room Control Room Control Room Control Room Control Room Control Room Field |
table 2
Project Constraints
Budget (see the budget table)
Timeline (see the timeline)