Datahall CRAH UMAS 10FSV041206-058-117.00x114.00 TCP

Brief Introduction

This is first of a kind CRAH, so Modbus maps are different. BMS Control Source (0:speed, 1:external room temp) and BMS Enable Source (0:keypad, 1:DI, 2:BMS) sent from PLC/Modscan PLC code for these CRAHs use Speed Control, i.e. Speed Setpoint sent from PLC/BMS. Return Air is generally not used for control during normal operation. Leak Detect alarm is the only alarm that will send unit to FailState. This is a (9) fan array CRAH unit.

List of Equipmentt

This cofiguration has been used for these models:

Model: 10FSV041206-058-117.00x114.00: 10-07-25

Hardware Prerequisites

The code is written for an ESP8266/ESP32-style microcontroller with WiFi capabilities.

Microcontroller: Firebeetle 2 ESP32.

States and Strategies

Provide a brief description of what variables and strategies were used in this configuraiton

Standby State

CW valve: Ramp Strategy ramp to 0
Supply Air temperature: Ramp Strategy ramp to 74
Return Air temperature: Ramp Strategy ramp to 86
Fan speeds: Ramp Strategy ramp to 0
Fan amps: Ramp Strategy ramp to 0
Fan run status: set to 0

Running State

Fan run status: set to 1
Fan min speed: initialized to 30
Fan max speed: initialized to 100
Fan speed: Ramp Strategy dynamically ramps to speed setpoint
Fan amps: Ramp Strategy ramp to 15
Fan operating hours: initialize totalizers
Supply air temperature: Saw Strategy ramps back and forth between 60 and 100 deg
CW valve: PID Strategy adjusts until Supply Air Temperature matches Supply Air Temperature setpoint

Fail State

Fan run status: set to 0
CW valve: Ramp Strategy ramp to 0
Fan speeds: Ramp Strategy ramp to 0
Fan amps: Ramp Strategy ramp to 0

1.9 KiB Raw Blame History