Canvas 4

Canvas 4 OCS – 3.5” Colour Touchscreen

The Canvas 4 sets the standard for functionality and performance. All units feature a built-in logic engine, operator interface, networking and I/O

  • All-new graphics engine built with Cscape 10 enhanced graphics
  • Multi-core SOM with dedicated logic and graphics cores
  • Bright 3.5” QVGA (320×240) display with 5 physical function keys
  • 6 I/O configurations for up to 42 I/O points onboard
  • Ethernet, RS-232/485 and CAN ports, 2MB Logic Memory
  • ¼ DIN cutout or DIN-Rail mountable, USB-A or Micro SD for data storage
  • Online Programming and MQTT support, as well as improved WebMI features
  • All Canvas models include WebMI+, MQTT, Enhanced IEC and J1939 features included as standard.

Networking features include:

  • (1) Built-in 10/100 Ethernet port
  • (1) Integrated CAN port that supports either CsCAN, CANopen, J1939 or DeviceNet Scanner


  • ALL-IN-ONE CONTROL – performs all machine functions in a
    unified hardware design; logic control, operator interface, I/O
    and networking.
    responsive machine control dashboards.
  • ALL NEW GRAPHICS OBJECTS – Designed from the ground up
    with all-new graphics. Trending, recipes, alarms – all redesigned
    with a modern look and fully featured.
  • MULTI-CORE MICROPROCESSOR – Fast, consistent scan times
    with separate, dedicated CPU cores for logic and graphics
  • FLEXIBLE LOGIC LANGUAGES – Use the logic language of your
    choice – Advanced Ladder Logic or the IEC 6-1131 languages.
  • INDUSTRIAL ETHERNET – Fast and flexible Ethernet with Ethernet IP,
    Modbus TCP, BACnet IP; FTP file transfer and Email.
  • IIOT & REMOTE CONTROL-Push data to the cloud with MQTT.
    Remotely monitor and control the machine with WebMI+ from
    a web browser. No extra licenses required!
  • OCS360 CLOUD SERVICE READY – Canvas is pre-configured to
    support Horner’s upcoming OCS360 Cloud Service.


Ladder Logic Memory 2 MB
Logic Scan Rate 0.02 mS/K
Removable Memory microSD
Local Comment Storage Yes
Floating Point Support Yes
AutoTune PID Capable Yes
Characters / Pixels 320 x 240 (QVGA)
Display Technology 3.5″ TFT Colour
Character Height selectable fonts
Number of Pages 1023
Fields or Objects per Page 1023
Total Keys 5
Function Keys 4
OEM Faceplate Available Yes
Built-in I/O Points 22-44
SmartStix, SmartRail, SmartBlock I/O Support Yes, CsCAN and Ethernet
Digital Inputs / Outputs, max 2048 / 2048
Analog Inputs / Outputs, max 512 / 512
General Purpose Registers (words) (50,000 retentive)
General Purpose Internal Coils (bits) 32768 (16384 retentive)
Ethernet Support Standard
Remote Access WebMI, HTTP or EnvisionRV
Remote File Access FTP or EnvisionFX
IIoT Support MQTT (Sparkplug)
Total Active Ports 2
RS-232 Ports / RS-485 Ports RS-232 & RS-485; RS-232 / RS-485 (1 of each)
PLC / Drive Protocols Yes
RTU / Modbus Master / Slave Yes
Serial ASCII In / Out Yes
USB Ports (A and Mini-B) Yes
Integrated CAN Networks 1
Supported CAN Networks CsCAN, CANopen, J1939 and DeviceNet Master
Maximum CAN Distance 500m per segment, 4 segments maximum
CAN Port (Independently Isolated) Remote I/O, Peer-to-peer Comms, Cscape
Supported CAN Protocols CsCAN, CANopen, DeviceNet, J1939
Ethernet Productivity One 10/100 Mbps (Auto-MDX)
Ethernet Protocols TCP/IP, Modbus TCP, FTP, SMTP, EGD, ICMP, ASCII
Remote I/O SmartRail, SmartStix, SmartBlock, SmartMod, OCS-I/O
Height 3.78″ / 96.0 mm
Width 3.78″ / 96.0 mm
Depth 2.26″ / 58 mm
I/O Module Depth COM option adds 0.5″ / 13 mm depth
Operating Temperature* -0 to 60°C *Note: -40°C Low Temp Option, Contact Factory
Humidity (non-condensing) 5 to 95%
Product Certifications CE, UL Class 1 Div II
Environmental Rating NEMA & UL Type 1, 3R, 4, 4x, 12, 12k, 13, ABS


Canvas Series Accordion Brochure Download
Cscape 10 & Canvas Presentation Download
Technical Documentation (Requires Login/Registration)
Canvas 4 User Manual Download
Quick Reference Guide Download
Canvas 4 Model 0 Datasheet Download
Canvas 4 Model 2 Datasheet Download
Canvas 4 Model 3 Datasheet Download
Canvas 4 Model 4 Datasheet Download
Canvas 4 Model 5 Datasheet Download
Canvas 4 Model 6 Datasheet Download

Part Numbers & On-Board I/O

HE-CV-035C-00 No built-in I/O
HE-CV-035C-02 12 DC in, 6 Relay Out, 4 – 12-bit Analog In
HE-CV-035C-03 12 DC in, 12 DC Out, 2 – 12-bit Analog In
HE-CV-035C-04 24 DC in, 16 DC Out, 2 – 12-bit Analog In
HE-CV-035C-05 12 DC in, 12 DC Out, 2 – 14/16-bit Analog In (mA/V/Tc/mV/RTD), 2 – 12-bit Analog Out
HE-CV-035C-06 12 DC in, 12 DC Out, 6 – 14/17-bit Analog In (mA/V/Tc/mV/RTD), 4 – 12-bit Analog Out
*Up To six mA/V In, mA/V RTD/Tc, and mA/V Out


Part Number Extension Description
No Extension Black
-00 Blue-Black
-01 Grey
-02 No Overlay


Part Number Extension Description
-10 Thermistor option. Add -10 to the part number for Thermistor support for Analog Inputs 1 & 2. Models 2, 3, and 4 only.
-14 Thermistor option. Add -14 to the part number for (4) Channel Thermistor support. Model 2 only.
-22 With Display Heater
-602 Screw type I/O terminals. Replaces spring type terminals. Model 6 only.
-603 With Display Heater and Screw type I/O terminals. Replaces spring type terminals. Model 6 only
(*) Please contact us for product availability and lead time.


CE Certified Link to Certifications Page
UL Certification Link to Certifications Page