FB_EcSetMasterState
With this function block the EtherCAT state of a master device can be requested and set. The requested EtherCAT state is transferred with the reqState variable. The function block requests the EtherCAT state and, unlike the function block FB_EcReqMasterState, remains active until the new state is set or the maximum time tTimeout is exceeded. The current state is output in the currState variable.
See also: FB_EcReqMasterState
Inputs
VAR_INPUT
sNetId : T_AmsNetId;
bExecute : BOOL;
tTimeout : TIME := T#10s;
reqState : WORD;
END_VARName | Type | Description |
|---|---|---|
sNetId | T_AmsNetId | String containing the AMS network ID of the EtherCAT master device. (Type: T_AmsNetId) |
bExecute | BOOL | The function block is activated by a positive edge at this input. |
tTimeout | TIME | Maximum time allowed for the execution of the function block. |
reqState | WORD |
|
reqState
EtherCAT state requested from the master. The possible values for reqState are:
Constant | Value | Description |
|---|---|---|
EC_DEVICE_STATE_INIT | 0x01 | Request Init state from master |
EC_DEVICE_STATE_PREOP | 0x02 | Request Pre-operational state from master |
EC_DEVICE_STATE_SAFEOP | 0x04 | Request Safe-operational state from master |
EC_DEVICE_STATE_OP | 0x08 | Request Operational state from master |
Outputs
VAR_OUTPUT
bBusy : BOOL;
bError : BOOL;
nErrId : UDINT;
currState : WORD;
END_VARName | Type | Description |
|---|---|---|
bBusy | BOOL | This output is set when the function block is activated, and remains set until a feedback is received. |
bError | BOOL | This output is set after the bBusy output has been reset when an error occurs in the transmission of the command. |
nErrId | UDINT | Supplies the ADS error code associated with the most recently executed command if the bError output is set. |
currState | WORD | Current EtherCAT state of the master |
Prerequisites
Development environment | Target platform | PLC libraries to include |
|---|---|---|
TwinCAT v3.1.0 | PC or CX (x86, x64, Arm®) | Tc2_EtherCAT |