Control Modules—Network Control Module 200 Series 9
RS-232 Submodule: Operator Terminal
When using the Operator Terminal (OT) program set, the VT100 (or PC
with VT100 emulation software) connects to the NCM via the RS-232
submodule, replacing the use of the Network Terminal. (Instead of
connecting to the RS-232 port, an OT can connect to the NT Port.
However, only one OT can be connected at a time.)
An Operator Terminal provides a higher level of capability than the
Network Terminal, allowing you to read and write to each attribute of a
Control System (CS) object, as well as define and build data bases for the
Trend and Totalization features. Refer to the Operator Terminal
Technical Bulletin (LIT-636015).
Note: When an Operator Terminal connects to an NCM through either
the submodule (Port 2) or the NT Port (Port 4), the integrated
RS-232 port (Port 3) will also support an unconfigured OWS. An
example of this situation is using a laptop computer to download
software into the NCM.
Additional I/O Support
The Network Terminal Port (Item 11 in Figure 1) supports a connection
from the Network Terminal Unit or Operator Terminal to provide local
operator I/O. The RS-232C Port (Item 12 in Figure 1) provides a
connection to a local workstation or printer.
The NCM powers up in either a cold start condition or a warm start
condition. In the cold-start condition, the NCM automatically requests the
OWS to download the code and data base information into the NCM’s
memory. Refer to the Operator Workstation User’s Manual (FAN 634).
In a warm start condition, the code and data base are stored in memory;
the NCM is immediately and fully operational following the initial
diagnostic tests.
By retaining memory during a power cycle, the battery backup provides a
warm start condition when power returns to the NCM.
A System Reset button (Item 13 in Figure 1) manually resets the NCM
under cold start conditions, which generates a request for code and data
download.
Power Up
Conditions
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