Omron NT31 Operation Manuals page 343

Lamps
[Input Functions]
[Output Functions]
[Processing Functions]
332
Light Function
Address
PC Bit Address
I/O Comments
Position
OFF state
- Allocated bit
Lamp bits can be allocated to the following host (PC) areas.
Symbol C Series PLC
DM Data memory
CH I/O relay
Timer present
TIM
value
Counter present
CNT
value
HR Holding relay
AR Auxiliary relay
LR Link relay
Expansion data
EM
memory *1 *2
*1 C--series EM (Expansion Memory) is available only in the C200HX/HG/HE (-Z).
*2 The EM (Expansion Memory) can be alocated only in the current bank.
Since the special auxiliary relays of the CVM1/CV series PCs are all allocated
to system functions, they cannot be used for purposes other than system use.
The range of each memory area differs according to the PC type. Refer to
APPENDIX L "PC Memory Map", page 684.
Lamps read the contents of a bit at the host and execute processing in accordance
with the bit status.
However, the bit is only read in the following case:
S When a lamp is used on the currently displayed screen
Lamps have no output function.
Lamps have no data processing function.
Allocated bit of the lamp ("Allocated bit", page 332)
Comment that indicates the contents of the allocated bit
Up to 16 alphanumeric characters
Position
ON state
Alloca CVM1/CV
tion Series PLC
Data memory
I/O relay
Timer present
×
value
Counter present
×
value
#
Special
auxiliary relay
#
Expansion data
memory *2
Section 7-6
Alloca
CS1 Series PLC
tion
Data memory
I/O relay
Timer present
×
value
Counter present
×
value
#
Holding relay
Special
×
auxiliary relay
# #
EM current
Bank *2
×: NG
: OK : Host link NG
Alloca
tion
×
×
×
×
#