1-port RS485
Kendrion Kuhnke Automation GmbH
400
17 May 2021
LED "IO"
The LED labelled "IO" indicates the state of the module's I/Os.
State
LED flash code
Explanation
Ok
Green, on
No error
Error
Red, 4x
EtherCAT watchdog
Red, 5x
Transmit queue overflow
Red, 6x
Receive queue overflow
Red, 7x
No Tx counter
Start, defective
Red
Module not initialised
LED "Power"
Not used
LEDs "Channel [COM State]"
The "Channel" LEDs indicate the state of every channel.
State
LED
Explanation
On
Green, flashing
Communication
Off
Off
No communication
Error
Red/green,
flashing
Controller communication error
Red, flashing
Controller error
Process Image
There are 20 PDOs containing 8 bytes of data each for every direction. Use PDO Assignment (objects 1C12
and 1C13) to vary the volume of data. Taken together with the mailboxes (32 bytes each), this is the
maximum configuration of ET1200.
Output Data (PLC -> IO, 0-160 Bytes)
Name
Size
Source
ControlData
8 bytes
PLC
TxData1[0..7]
8 bytes
PLC
…
…
…
TxData19[0..7]
8 bytes
PLC
The process image holds max. 152 bytes of payload data per direction.
ControlData:
Name
Format
Source
TxCounter
Word
Incrementing the TxCounter tells the gateway that the process
image contains new data to be sent.
RxCounterCon
Word
If synchronised data (RxSync) is used, this object is used to
acknowledge that the data received has been processed. Only
then will the gateway send the next data.
TxNrOfMsg
Word
Number of bytes to be sent from the process image. Range:
0..152. Starting point of the data section is TxData1[0].
ResetError
Bit (1)
Bit 0 ->1: Resets errors that have been removed.
Unused 0..14
Bit (15)