User's Manual

CHAPTER 3
EXAMPLE APPLICATIONS
PLC Emulation Command Lists
Revised: 10 Feb 14 3-11 EST P/N AA107-195CM
W
h
en using the PLC emulation driver at the Master site, you
may notice many of the software commands required for
transparent operation are not required. The following are a
summary of the software command necessary to configure
the ESTeem 195C or 195M for specific PLC emulation
drivers.
Figure 9 shows the drop down list of available PLC
emulation drivers. Modbus RTU, Modbus ASCII and
Opto22 have a single configuration type and do not require
any additional software commands.
Rockwell Automation’s DF1 driver supports DF1 Full-
Duplex, DF1 Half-Duplex and DF1 Radio Modem protocols
with BCC or CRC error checking on each. The following
table list the required software command necessary for each
of the above conditions:
Figure 9: PLC Emulation Selection
Rockwell DF1 Emulation Softw
are Settings
DF1 Protocol Software Command Disable Acknowledge (disack command)
Full Duplex using BCC a_bctrl full_bcc Yes (Checked)
Full Duplex using CRC a_bctrl full_crc Yes (Checked)
Half Duplex using BCC a_bctrl half_bcc Yes (Checked)
Half Duplex using CRC a_bctrl half_crc Yes (Checked)
Radio Modem Protocol - BCC a_bctrl full_bcc No (Unchecked)
Radio Modem Protocol - CRC a_bctrl full_crc No (Unchecked)
Figure 10 displays the Allen-Bradley (a_bctrl command)
command settings and where to find the Disable
Acknowledge (disack command) settings.
Figure 10: PLC Emulation Selection
Technical Tip: Only the
ESTeem 195C/M connected to
the PLC initiating the message
instructions (Master Site) will
have the PLC emulation
configured.