Delta RMC101 - Manual (Page 286)

RMC100 and RMCWin User Manual
5-36
This technical brief will compare the four discrete I/O interfaces of the RMC100 series product-
line, describe implementing Parallel Position Mode, and finally provide a sample application using
Parallel Position Mode.
DI/O Communication Mode Comparison
The following chart lists the advantages and disadvantages of each communication mode. Each
word or phrase in bold print appears in RMCWins online help index.
Interface
Mode Advantages Disadvantages
Parallel
Position
Mode • Any position can be
moved to in a single
PLC scan
• Any open loop drive can
be triggered in a single
PLC scan
• Multiple profiles can be
selected for any move
• Requires a PLC
• Returns only a Halted
Bitindicating an error
has occurredand an In
Position Bit per axis
• Issues only Go and
Open Loop commands
• Gives commands to only
one axis per scan
• Is limited in number of
speed/acceleration
profiles
Parallel
Event Mode • Up to four axes may be
commanded at once
• PLC or thumb-wheel
switches may be used
• Allows use of Event
Control feature
• Requires parallel inputs
• Returns only a Halted
Bitindicating an error
has occurredand an In
Position Bit per axis
• Sequence must be pre-
programmed in Event
Control
Command
Mode • Any RMC command can
be issued
• Any status information
can be retrieved
(including Actual
Position, Actual Speed,
Drive, Error Bits, and
other Status Bits)
• Requires a PLC
• Requires 2 PLC scans
per command
• Gives commands to only
one axis per command
cycle
Input to
Event Mode • Does not require a PLC
• Multiple axes may be
given commands from a
single input
• Allows use of Event
Control feature
• Returns only a Halted
Bitindicating an error
has occurredand an In
Position Bit per axis
• Issues only Start Event
commands
Implementation
The following diagram shows the electrical control connections of a single-axis hydraulic system
using RMC-DI/O in Parallel Position Mode (the PC and its RS232 cable are needed only during
setup):