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21 Applied Instructions (Real Time Clock Control)
21.7 TRD / Read RTC data
557
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
21
Appl
ied
 In
stru
cti
ons 
(R
eal
 T
im
C
lock
 Contr
ol)
22
Ap
plied
 Instru
ctio
ns 
(E
xt
er
na
l De
vi
ce
)
23
App
lied Instr
ucti
ons 
(Ex
tensi
on 
Functi
on)
24
Ap
pl
ied In
struct
ions 
(O
thers)
25
Appl
ied
 Instru
cti
ons
 
(B
lock
 Dat
O
per
at
io
n)
26
App
lie
d Instr
uction
(Charac
ter 
Stri
ng C
ontrol
)
27
Ap
pl
ied Inst
ruct
io
ns 
(D
ata
 Op
eration 3
)
28
Appl
ied
 In
stru
cti
ons 
(D
ata C
om
par
ison
)
29
App
lie
d Instr
uction
(D
ata
 T
abl
O
peration
)
30
Appli
ed In
struc
tions
(E
xt
ernal Devi
ce 
Comm
uni
cat
ion)
21.7
TRD / Read RTC data
Outline
The clock data is read out in the real-time clock built in the PLC.
When using FX
2NC
 PLC, optional memory board for Real time clock is required.
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
FX
3U(C)
FX
3G(C)
FX
3S
FX
2N(C)
FX
1N(C)
FX
1S
FX
U
/FX
2C
FX
0N
FX
0(S)
Instruction 
name
Operation
Execution 
form
Expression in each language
Structured ladder/FBD
ST
TRD
16 bits
Continuous
TRD(EN,d);
TRDP
16 bits
Pulse
TRDP(EN,d);
Variable
Description
Data type
Input
variable
EN
Execution condition
Bit
Output
variable
ENO
Execution state
Bit
The reading destination of clock data and the head device are specified (7
points occupied).
ARRAY [0..6]
OF ANY16
Operand 
type
Bit Devices
Word Devices
Others
System user
Digit designation
System 
user
Special 
unit
Index
Cons
tant
Real 
Number
Character 
String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS T C D R U
\G
V Z Modifier K H
E
"
"
P
z z z
S1
S2
z
TRD
EN
ENO
d
TRDP
EN
ENO
d