Delta RMC101 User Manual
Page 69
Connecting to an RMC 3.3
Using RMCWin
3-19
• Communications Update Rate slider:
This slider adjusts a delay that is inserted between transactions between RMCWin and the RMC.
The only purpose for this control is to decrease the load on slower PCs; the RMC can handle any
of the communication speeds. If this software seems to slow down Windows, move this slider
closer to Slow.
Move the slider toward Slow to decrease the load on the PC, and toward Fast to increase the load
on the PC.
Note:
This setting is ignored while reading up a plot; no delay is used.
See also: TCP/IP Direct to RMC-ENET Overview, Connecting RMCWin to an RMC
3.3.7.5 Communication Driver: TCP/IP-to-RS232 Bridge Overview
Note:
This communication driver requires RMC100 CPU firmware dated 20010522 or later.
This driver adds many of the benefits of Ethernet—it allows routing and addressing multiple
modules and provides isolation—to all RMCs because it uses the RMC100 CPU's "RS-232
Monitor" serial port, but does so at the expense of performance. This is possible using a TCP/IP-
to-RS232 Bridge device.
The following diagram shows the typical network layout. Additional RMCs could either be added
through an additional bridge each to the hub or switch, or they could be plugged into additional
serial ports on a multi-port bridge.
This diagram could also be drawn with any of the TCP/IP routing variants shown in the TCP/IP
Direct to RMC-ENET Overview topic. Delta does not sell its own TCP/IP-to-RS232 bridge, but
many companies make them. The UDS from Lantronix (www.lantronix.com) was used in testing.
Comparison with Other Communication Drivers
• Serial: The serial port is generally several times faster, and eliminates the requirement for an
Ethernet adapter in the PC, but it does not provide isolation, has much shorter cable distances,
cannot route across intranets and the Internet, and can only address a single RMC per serial port.
• TCP/IP Direct to RMC-ENET: The direct method is much faster, and does not require an
additional bridge device, but it is limited to RMCs with the RMC-ENET module.
See also: TCP/IP-to-RS232 Bridge Configuration, Serial Overview, TCP/IP Direct to RMC-ENET
Overview, Connecting RMCWin to an RMC