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2-18
Section
Mathematical Function
271
Using Numeral Memory Tables
Any numeral memory table can be specified as an operand. When a numeral
memory table is specified, the number of words used in the calculation or the
number of words stored as the calculation result depends upon whether words
are allocated to the host.
Words
not
allocated:
The operands/calculation results are treated as 2-word data.
Words allocated:
The operands/calculation results are treated as 1-word data if 1 word is allo-
cated or 2-word data if 2 words are allocated.
Using PC Addresses
Words in the following data areas of the host (PC) can be specified as operands
or calculation results.
Symbol
C-series PCs
Allocation
CV-series PCs
Allocation
CS1-series PCs
Allocation
None
IR Area
f
CIO Area
f
CIO Area
f
H
HR Area
f
---
---
HR Area
n
A
AR Area
f
Auxiliary Area
AR Area
f
L
LR Area
f
---
---
LR Area
*1
n
T
TC Area,
Timer PVs
Timer Area,
Timer PVs
TC Area,
Timer PVs
TU
---
---
---
---
TC Area,
Timer Completion Flags
C
TC Area,
Counter PVs
Counter Area,
Counter PVs
TC Area,
Counter PVs
CU
---
---
---
---
TC Area,
Counter Completion Flags
W
---
---
---
---
WR Area
n
TK
---
---
---
---
Task Flags
D
DM Area
f
DM Area
f
DM Area
f
E
EM Area
*2
,
current bank
f
EM Area,
current bank
n
EM Area,
current bank
n
E0_ to
EC_
---
---
---
---
EM Area,
EM banks 0 to C
n
f
: OK
: NG
n
: Host link not available
*1: Words LR 00000 to LR 00199 are converted to CIO 01000 to CIO 01199.
*2: The EM Area is valid for the C200HX/HG/HE(-Z)E PCs only.
Since words in the Auxiliary Area of the CVM1 and CV-series PCs is allocated to
system functions, and it cannot be used for purposes other than system use.
Timer and counter PVs cannot be specified directly. Use numeral memory tables
when using timer/counter PVs.
The range of each memory area differs according to the PC. Refer to
Appendix D
PC Memory Maps on page 429.
When a memory link is used, any PT memory address (0000 to 9999) can be
specified.
When a PC address (PT memory) is used, the number of words used in the cal-
culation and the number of words stored as the calculation result are specified
with the data length. The data length specification is the same for all operands
and results of a formula.
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Summary of Contents for NT21 Series
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