Product Information; Features - Omron E5ZD Operation Manual

Features

1-1

Product Information

1-2 Features
Multipoint PID Control
Host-computer Management The E5ZD does not have setting keys or a display, but is operated through com-
Removable Terminal Blocks E5ZD-4/-6/-8jjj-E Units use sensor input terminal blocks with detachable
Remote Input Terminal
Blocks
High-speed Processing
Serial Communications
Memory Banks
Heater-burnout Detection
Other Errors Detected
Memory Protection
Diagnostic Functions
2
The E5ZD Multipoint Temperature Controller processes temperature data ob-
tained from sensors and forms a part of a control system.
The Current Transformer (E54-CT1 or E54-CT3) is not provided with the E5ZD
Multipoint Temperature Controller. Purchase current transformers as required
for heater burnout detection.
The Terminal Block, I/O Block Unit, and cable are not provided with the
E5ZD-8HjjM-E.
The basic features of the E5ZD are outlined below. Refer to relevant sections of
this manual for details.
The E5ZD provides four-, six- or eight-point control via a single control-panel-
mountable board. PID with feed-forward circuitry is used as the control method.
mands downloaded from a host computer.
upper portions that can be mounted to the Temperature Control Unit after the
sensors have been connected.
E5ZD-8HjjM-E Units can be connected by cable to a remote terminal block
that handles sensor inputs, CT inputs, and memory bank designation inputs.
Similarly, control outputs and alarm outputs can use an I/O Relay Terminal.
The E5ZD features a maximum 0.5-second sampling time and a 16-bit CPU to
reduce processing time.
The E5ZD is available with RS-232C, RS-422, or RS-485 communications. With
RS-422 or RS-485 communications, a single host computer can be used to con-
trol up to 16 E5ZDs.
For each controlled point, there is a memory bank that consists of the various set
values such as control temperatures and PID constants. This enables you to
change a group of settings with a single operation. There are eight memory
banks, and you can use either communications or switch settings to designate
the one to be used.
The E5ZD can be ordered with a detector for circuit breaks in the heater. If a
break is detected, the HB alarm output is turned ON.
SSR errors and welded relay contacts can also be detected. These conditions
turn ON an HS alarm output.
All settings for temperature control, including PID values, can be transferred to
nonvolatile memory to provide protection against power interruptions.
Open circuit faults in the sensor circuit, and input temperatures that are too high
or too low can be detected.
Upon the application of power, memory checks are carried out, and AD conver-
ter checks are run to ensure correct temperature measurements. A watchdog
Section 1-2