Overview of CoE objects EL6001, EL6021
EL600x, EL602x
166
Version: 4.6
Status word
The status word (SW) is located in the input process image, and is transmitted from terminal to the controller.
Bit
SW.
15
SW.
14
SW.
13
SW.
12
SW.
11
SW.
10
SW.
9
SW.
8
SW.
7
SW.6
SW.5
SW.4
SW.3
SW.
2
SW.
1
SW.
0
Name
(small and
medium
process im-
age)
-
-
-
-
-
-
-
-
-
IL2*
IL1*
IL0*
BUF_F
IA
RR
TA
Name
(large process
image)
IL7
IL6
IL5
IL4
IL3
IL2
IL1
IL0
-
OVERRUN
ERR
FRAMING
ERR
PARITY
ERR
BUF_F
IA
RR
TA
If the small or medium process image is used, only bits SW.7 to SW.0 are shown as status bytes! The
number of input bytes available for transfer from the terminal to the controller is displayed by bits IL2* ... IL0*.
Legend
Bit
Name
Description
SW.15 ... SW8
IL7 ... IL0
(InLenght*)
1
dec
... 22
dec
If the large process image is used: Number of input bytes available for trans-
fer from the terminal to the controller.
-
If the small/medium process image is used: not shown
SW.7
-
0
bin
reserved
SW.6
IL2*
(InLenght*)
OVERRUN ERR
0 ... 1
If the large process image is used: An overrun error has occurred. The af-
fected data item is not loaded into the receive FIFO of the terminal and is lost.
1 ... 6
If the medium process image is used: Number of input bytes available for
transfer from the terminal to the controller.
1 ... 4
If the small process image is used: Number of input bytes available for trans-
fer from the terminal to the controller.
SW.5
IL1*
(InLenght*)
FRAMING ERR
0 ... 1
If the large process image is used: A framing error has occurred. The affected
data item is not loaded into the receive FIFO of the terminal and is lost.
1 ... 6
If the medium process image is used: Number of input bytes available for
transfer from the terminal to the controller.
1 ... 4
If the small process image is used: Number of input bytes available for trans-
fer from the terminal to the controller.
SW.4
IL0*
(InLenght*)
PARITY ERR
0 ... 1
If the large process image is used: A parity error has occurred. The affected
data item is not loaded into the receive FIFO of the terminal and is lost
1 ... 6
If the medium process image is used: Number of input bytes available for
transfer from the terminal to the controller.
1 ... 4
If the small process image is used: Number of input bytes available for trans-
fer from the terminal to the controller.
SW.3
BUF_F
1
bin
The reception FIFO is full. All further incoming data will be lost!
SW.2
IA
(InitAccepted-Bit)
1
bin
Initialization was completed by the terminal.
0
bin
The terminal is ready again for serial data exchange.
SW.1
RR
(ReceiveRequest)
toggle
Via a change of state of this bit the terminal notifies the controller that the
DataIn bytes contain the number of bytes indicated via the IL bits. The con-
troller has to acknowledge receipt of the data in the control byte via a change
of state of bit
(RA). Only then new data can be transferred from
the terminal to the controller.
SW.0
TA
(TransmitAccepted)
toggle
The terminal acknowledges receipt of data by changing the state of this bit.
Only now new data can be transferred from the controller to the terminal.
