C200HW-PRM21 Omron, C200HW-PRM21 Datasheet - Page 2

• Manufacturer Part Number: C200HW-PRM21
• Description: MASTER MODULE
• Manufacturer: Omron

Specifications of C200HW-PRM21

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Omron Simplifies Setup for Network Communications
Examine the realities and costs involved in building the network communications that let you integrate plant floor data with front office
systems. Two considerations move to the top of the list: flexibility to handle changing requirements easily and the ability to integrate legacy
products. The table below clarifies the advantages of Omron’s approach.
Comparison of Omron’s Data Link to Traditional Block Transfer
Setup procedure
Making changes
Costs and future
Handling legacy
Data Exchange
Setup example
accomplishes
expandability
systems
Method
What it
C J 1 I N D U S T R I A L N E T W O R K I N G A N D C O M M U N I C A T I O N S
Makes available an
easily expanded area
of data that is
accessible to all PLCs
on the network. Data
requests are handled
outside the scan time
by co-processors in
the communications
modules.
• Use dialog box “wizard” setup
• User defines how much data is to be sent via the
The screen capture shows a typical Data Link set-up in
progress. The user can define:
• How much data gets sent
• What memory area is the source of the data and
• Where to put received data
• Amount of data to be handled, changing where it goes
• No impact on program execution
Data Link reduces the original cost of programming in
setting up the routing tables for exchange and offers
maximum flexibility for future changes, requiring minimal
editing to routing table data.
Omron’s CX-Programmer software covers all Omron’s
programmable controllers with networking capability,
from micros up to large rack systems. Access to the
memory areas available for each model is selected in a
dialog box when the specific model is designated.
Data Link
Data Link, what memory location is to be used and
how much to “read” from all other network nodes
or adding a new node is as simple as the initial setup
Block Transfer
Defines a point-to-point
connection between a desired
individual data point in a PLC to
make a specific link to the
requesting PLC and define the
amount of data that can be
exchanged. Typically limited to
64 words.
• Use special Move instructions
• Must follow any Read or Write command
• Error checking is done by programming and data
Printout shows the first rung of an extensive program
required to define point-to-point data exchange and to
verify data consistency.
• Error checking is done by programming
• Size of transfer affects program cycle timing
• Program must be adjusted if data size changes;
• If different models are communicating, up to 3
Long hours of programming each individual point-to-
point exchange followed by system testing to be sure
cycle time is acceptable, followed by any modifications to
bring cycle time back into bounds. Future changes are
time consuming editing projects.
Depending on the manufacturer, multiple programming
software packages are required to set up and modify the
block transfer ladder programming across the full range
of PLCs in an installation. Finding and hiring
programmers with experience in older platforms becomes
difficult as time goes by.
consistency must be checked due to scan cycle
mismatches
program execution time changes
programming software packages could be required
B-75