Electro Cam PS-6000 Series - Manual (Page 4)

PS-6000 Series with -MB Option
— with Modbus ™ ASCII Communications
Description
Standard Modbus™ ASCII protocol allows a host computer,
Programmable Logic Controller (PLC), intelligent touch panel,
or other compatible logic circuitry to easily monitor or modify
data within the PS-6000-MB while the machine is in motion.
The control data in the PS-6000-MB is organized as registers
and coils, compatible with PLC programming techniques. Reg-
isters are used to store control parameters at specific addresses.
Coils represent channel outputs and logic inputs. Through se-
rial communications, coils allow outputs to be forced ON or OFF,
and allow inputs to be monitored.
The data can be changed by writing to registers, and monitored
by reading from registers. All controller data, including position,
pulses, RPM, speed compensation, and timed output values,
are available through registers.
NOTE: All other features of the -MB version of 6000 series
controllers are the same as those for standard PS-6000
series controllers.
Improved Machine Control
The controller quickly responds to changes in line speed and
product movement by combining automatic speed compensa-
tion with fast scan times. Modbus serial communications makes
it easy to integrate the PL
µ
S controller's high-speed control
characteristics into larger control systems.
Messaging Capability
The PL
µ
S keypad/display can display stored messages or mes-
sages received from a host computer. Each message, contain-
ing up to 32 characters, is stored in non-volatile EEPROM
memory.
Mapping
Mapping allows the programmer to arrange data into blocks of
registers for optimal communication efficiency, giving direct
access to specific indexed data items. For example, setpoint
values may be mapped into a series of direct access registers
in order to display more than one value at once on the host
computer.
PS-6000-MB System Configuration
The Modbus™ ASCII protocol allows the PS-6000-MB Series
controller to communicate with various control hardware and
software, including:
■ PC's using Microsoft ® Windows™ software such as
FactoryLink ® , Intellution™, Lookout™, and Wonderware ®
■ PC's using DOS software such as Interact™
■ Intelligent Touch Panels
■ PLC's
As the diagram in Figure 2 illustrates, the host computer com-
municates to the PL
µ
S using Modbus™ ASCII serial commu-
nications. The PL
µ
S controller handles high-speed machine
functions through direct wiring of inputs and outputs to the ma-
chine.
The Modbus serial commands in the PS-6000-MB Series con-
troller allow you to monitor the program, adjust the current pro-
gram, or change the program through a host computer system.
This allows the flexibility to change product size or configura-
tion quickly and automatically, reducing downtime and improv-
ing productivity.
Figure 2
4
Benefits