2-2
Section
Areas for Control/Notification
47
The PT status control area (host
↔
PT) can be allocated in the following host
(PC) areas.
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.
The Auxiliary Area of the CVM1 and CV-series PCs is allocated to system func-
tions, and cannot be used for purposes other than system use.
The range of each memory area differs according to the PC. Refer to
Appendix D
PC Memory Maps on page 429.
Functions of the PT Status Control Area
Screen Switch Setting
Data is written to the screen switch setting word from both the PT and the host.
The meaning of the data differs according to whether it is written from the PT or
the host. However, if the PT is currently operating, the number of the screen dis-
played is always written to the screen switch setting word.
Reference:
When the PT is set to NT30/620 compatible mode, data can be written from the
host only. In this case, the screen switch setting notification from the PT occurs in
the first word (word m) of the PT status notify area. Refer to
Appendix C for details
on the NT30/620 compatible mode.
When Data is Written From The Host
To switch the screen displayed at the PT by an instruction from the host, write the
screen number, as a 4-digit BCD or hexadecimal value, to the screen switch set-
ting word. Whether the value is expressed in BCD or hexadecimal is determined
Allocated Words of the
PT Status Control Area
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Summary of Contents for NT21 Series
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