Technical Specifications; 2850T Controller - gefran 3850T Use And Installation Manual

10.1. 2850T controller

OPERATOR INTERFACE
DISPLAY
KEYBOARD
CONTROL FUNCTIONS
LOOP
(Regulation)
SETPOINT PROGRAMMER
80703B_MHW_2850T/3850T_02-2019_ENG

10. TECHNICAL SPECIFICATIONS

Type
View area
Lighting
Resolution (pixel)
Colors
Max brightness
Contrast
View angle
Type
PID
Regulation type
Control output
Valve control
Sampling time
Tuning
Alarms
Programmer type
Program profile
Program
Segments
IN profile events
OUT profile events
Simplified configurability
HBB alarm
10. TECHNICAL SPECIFICATIONS
TFT Touch Screen with 4-wire resistive type technology
Diagonal: 3,5"
Dimensions (L × H): 70 × 52,5 mm (2.57" x 2.07")
Back lit with LED, duration 50.000 hours @ 25 °C (77 °F)
320 × 240 (QVGA)
262,000
400 cd/m
2
400:1
Horizontal: 60°
Vertical: +45° ... -60°
Number of keys: 6 (of which one programmable)
Type: mechanical
Single loop; Cascade (2 consecutive PID: PID1-PID2, PID3-
PID4 ...); Ratio; Valve
Number: 8 max
Parameter groups: 10 max
PID
ON/OFF
Single action heat or cool
Double action heat or cool
Type: continuous (0... 100%) or ON/OFF with PWM modulation.
Cycle time: constant or optimised (Burst Firing)
Open/close for floating type motorized valve
Open/close for motorized valve with feedback (potentiometer
position control)
25 ms
Automatic Self Tuning algorithms
Number: max 4 associated with each PID
Type: maximum, minimum, symmetric, absolute/relative
Synchronous and asynchronous setpoint programs
Single-segment setpoint or ramp + maintenance profile
Integrated function blocks
From 1 to 4 synchronous profiles
Max number of programs: 200
Maximum number of programs running at the same time: 4
Available commands: START, HOLD/PAUSE, RESET, END,
SKIP
Status outputs: RUN, READY,END, HOLD
Setting: time segments (hh: mm / mm: ss /
dd: hh) or gradient configuration
Maximum number of segments per program: 50
Maximum number of ramps and holds per program: 100 (50
ramps - 50 holds)
High/low limit threshold configurable for each segment
PID group activation for each segment
Max number of settable IN events: 16
Acknowledged events: digital IN-resource, digital OUT, system
merker
Max number of settable OUT events: 16
ON/OFF while running the profile segment
Events acknowledged: digital OUT resource, logic operation,
programmer status
Template
Configuring and running the same program on several PIDs
simultaneously
Alarm range configuration per single segment
High/low range setpoint
139