Eaton EASY-E4 Series User Manual

6. Function blocks
6.1 Manufacturer function blocks
Level control
The contents of a liquid tank must not fall below or exceed a specific liquid level.
The ACTUAL value (level) is higher than the SETPOINT, meaning that liquid needs to be
drained. Function block output Q1 switches the drain valve on.
The ACTUAL value (level) is lower than the SETPOINT, meaning that liquid needs to be
replenished. Function block output Q2 switches the supply valve on.
Hysteresis values H1 and H2 define how long liquid needs to be drained or replenished.
This also means that they define the volume before draining and after replenishing.
See also
→ Section "TC - Three step controller", page 297
→ Section "FT - PT1-Signal smoothing filter ", page 279
→ Section "VC - Value limitation ", page 302
→ Section "BC - Block compare", page 306
→ Section "BV - Boolean operation", page 353
→ Section "PO - Pulse output", page 284
easyE4 11/18 MN050009 EN www.eaton.com
301

Eaton EASY-E4 Series Specifications

General

Type	Programmable Relay
Digital Inputs	Up to 12
Digital Outputs	Up to 8
Display	LCD
Operating Temperature	-25°C to +55°C
Protection Degree	IP20
Storage Temperature	-40°C to +70°C
Supply Voltage	24 V DC, 100-240 V AC
Analog Inputs	4
Outputs	Relay, transistor
Programming	EASY-SOFT-PRO
Communication	Ethernet, Modbus, CANopen
Expansion	Expandable with additional modules
Relative Humidity	5% to 95% (non-condensing)
Standards	IEC/EN 61131-2, UL 508, CSA C22.2 No. 142