Jetter JVM-407B-HMI, User Manual

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138 Jetter AG
6 CANopen® STX API
The declaration of the emergency message Rx consists of the following
elements:
CanOpenAddEmergencyRx(
CANNo:Int,
// Number of the bus line
NodeID:Int, // Node ID
// Status, number of valid messages
ref stCanOpenEmergencyStat:CanOpenEmergencyStat,
// Array holding the emergency messages
ref CanOpenEmergencyMSG:CanOpenEmergencyArray,
):int
Example:
The above program lines must be included into the corresponding tasks of
your application program.The example below shows an emergency message
from a device with node ID 21.
...
// Initializing the CAN bus once.
...
// Defining global variables
Var
stCanOpenEmergencyMsg : ARRAY[5] of CanOpenEmergencyMsg;
stCanOpenEmergencyStat : CanOpenEmergencyStat;
End_Var ;
stCanOpenEmergencyStat.lBuffer :=
sizeof (stCanOpenEmergencyMsg);
iRet:= CanOpenAddEmergencyRx(0, // CANNo.
21, // NodeID
stCanOpenEmergencyStat, // Status
stCanOpenEmergencyMsg); // Array
...
The above program lines produce the following result:
When the device with node ID 21 receives an emergency message, the value
in register 400100 switches from 0 to 1 (true).
Reset this value always to 0 (false). In doing so, you make sure that new
emergency messages are displayed.
Emergency message Rx