CARD” that handles the given channel, followed by the SUBCHANNEL NUM-
BER corresponding to this channel (1 through 8).* A-Slot capacities vary with
mainframe models. A mainframe of the “10KU” family can hold up to four
optional A Cards; a “10K1/10K2” mainframe, up to twenty; and a “10K4T”
mainframe, up to ten.
For example, the channel corresponding to the fifth subchannel of the card
occupying a Model 10K4TA’s “A SLOT No. 9” will have a location number of
“95”; the channel corresponding to the first subchannel of the card occupying
a 10K2D’s “A SLOT No. 18” will have a location number of “181.”
h. Again, use the
Step and Back Space keys to interrogate a continuous
sequence of channels for their respective locations. Remember that this
“stepping” procedure will work following any initial keyboard interrogation of
the form
[MNEMONIC] n [CR]
where “n” is the number of the first argument of the desired series (Channel
No., Bit No., Page No., “Execute” No., etc.).
8
SETTING SYSTEM SCAN RANGE
Before you proceed to calibrate any of your system’s data channels, you should
define its default SCAN RANGE. In this section, you will learn to use the
TERMI-
NATOR (TER)
command to do this.
a. Enable the EEPROM Write Protect function by turning ON the EEPROM Switch
(placing it in the
upward position).**
b. A System 10’s initial default scan range is normally preset at the factory. The
typical range is from Channel No. 1 through the highest Channel Number
called for by the system configuration specified at the time of order. Deter-
mine this initial range by entering from the keyboard an interrogation of
TER [CR]
The number of the current “TERMINATOR CHANNEL” will be displayed. We
will call this number “t
1
.”
c. Refer to the
Locate (LCT) column in Section 2 of your System 10 Data Sheet.
You should already be aware of the “location” of the real channel that uses the
source transducer you hooked up in Section 6, above. For example, if you
cabled your real-world transducer to the first subchannel of the conditioner
card in A Slot No. 3, the corresponding real channel would be the channel
“located” at “31.” Find the location value of your “live” real channel in the
LCT
column. Note the corresponding CHANNEL NUMBER in the Channel (CHN)
column. We will call this number “x.”
d. Now enter a command of
TER = t
2
[CR]
where “t
2
” is a number different from “t
1
” and higher than “x.” This command
assigns Channel No. t
2
to be the new system Terminator Channel. On
powerup, the Central Processor’s effective scan range will always be from
A - 13
SETTING SYSTEM SCAN RANGE
“O
NTHE
A
IR
” (A-S
IZED
)
* An A Slot will usually have as many “subchannels” as the number of individual analog inputs its
card can handle (e.g., eight for a Model 10A9-8C, four for a Model 10A10-4, one for a Model
10A40, etc.).
** Or by commanding BIT 999 = 1 [CR].
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