8.
other channel parameters that may apply (including Linearization Func-
tion, Conversion Channel assignment, Range value, and Sensitivity value)
The data sheet also shows which channels, if any, have been preassigned to
CALCULATION and/or ANALOG OUTPUT functions. It lists all “EXECUTE”
statements that have been pre-entered for your system, as well as all “LOGIC
SOURCE” assignments for system bits. Other miscellaneous system parame-
ters are also listed. If the mainframe has a multichannel LCD or VFD display, it
gives all display-page channel lists and unit-legend assignments. Finally, it
gives all relevant SERIAL NUMBERS and SOFTWARE/HARDWARE “VERSION”
NUMBERS, plus all initial mainframe A-SLOT ASSIGNMENTS.
For the purposes of this tutorial procedure, you need only refer to the “CHAN-
NEL CONFIGURATION” section of the data sheet.
b.
Since you will not be entering any setup values here, but only interrogating the
system for existing values, the EEPROM Write Protect function need not be
enabled. Turn OFF the mainframe’s EEPROM Write Protect Switch by placing
it in the downward position.*
c.
Enter from the keyboard a command of
TYP 1 [CR]
This is an INTERROGATION (or “READ”) command. Unlike most SETUP (or
“WRITE”) commands, an interrogation command has no “equals” sign (=). It
doesn’t serve to enter (or “write”) system configuration data into the Central
Processor’s EEPROM, but to retrieve (or “read”) configuration data out of it.
The two-character (hexadecimal) “TYPE CODE” shown on the data sheet for
Channel No. 1 should now appear in the billboard region of the mainframe or
keyboard display. A channel’s type code specifies one or more special pro-
cessing factors that may apply to that channel, including range, sensitivity, lin-
earization table, calibration procedures, etc. For example, a type of
19
signifies a “Type J” thermocouple input, and a type of
6B
signifies a ±200 V-
DC voltage input. A complete list of all channel type codes may be found in
Appendix C
of the System 10 Guidebook.
d.
Press the keyboard’s
Step
key. This “steps” the last-entered interrogation
command to the next channel in numerical sequence. Thus, the type code
for Channel No. 2 should now appear on the billboard. Check the data sheet
to verify that this is indeed the case.
e.
Use the
Step
key to continue “stepping” through several more channels. (For
rapidly stepping through a whole range of channels, press
Step
and hold it
down.)
f.
Now use the
Back Space
key to “step” backwards through the interrogation
series.
g.
Enter from the keyboard a command of
LCT 1 [CR]
The appropriate “LOCATION” number for Channel No. 1 should now be dis-
played.** The location number consists of the A-SLOT NUMBER for the “A
A - 12
D
ATA
C
HANNEL
C
ONFIGURATION
“O
N THE
A
IR
” (A-S
IZED
)
* If you used the
BIT 999 = 1 [CR]
command to enable the EEPROM Write Protect function, you
can disable this function simply by typing on the keyboard a command of
BIT 999 = 0 [CR]
.
** The default “location” number for all channels to which the “WRITE” form of the
LCT
command
has not been applied is “11.” For a “nonlocated” channel—for example, a “pseudochannel” or
“conversion channel”—the response to
LCT x [CR]
is “N/A.”
Summary of Contents for System 10
Page 31: ...GETTING YOUR SYSTEM 10 ON THE AIR SB 2 FOR A SIZED MAINFRAMES...
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