FB_MBUS_ELV_CMa10_20

The function block FB_MBUS_ELV_CMa10_20 is used to read temperature and humidity sensors from elvaco.
Can be used with the sensors CMa10 and CMa20.
The function block can only be executed together with the function block FB_MBUSKL6781().
![]() | Further information |
Inputs
VAR_INPUT
usiAddress : USINT;
stSecAdr : ST_MBUS_SecAdr;
eBaudrate : E_MBUS_Baudrate := eMBUS_Baud2400;
bStart : BOOL;
bSND_NKE : BOOL := TRUE;
bReadInit : BOOL := TRUE;
tMinSendTime : TIME := t#2s;
usiUnit : USINT;
bDisabled : BOOL := FALSE;
END_VAR
Name | Type | Description |
---|---|---|
usiAddress | USINT | Primary address of the meter to be read with this function block. |
stSecAdr | Secondary address of the meter to be read with this function block. | |
eBaudrate | 300, 2400, 9600 baud | |
bStart | BOOL | All meters are read once on the positive edge of this input. |
bSND_NKE | BOOL | TRUE initializes the meter for each read operation and sets the meter to the first telegram (SND_NKE). |
bReadInit | BOOL | If the PLC is restarted, the meter is read once. |
tMinSendTime | TIME | Default t#2s. The meter is read again, once the time set here has elapsed. If t#0s the meter is not read and can be read manually with bStart. |
usiUnit | USINT | Unit of the energy values to be output by the function block. 0=W(h) / 1=KW(h) / 2 =MW(h) / 3=GW(h). |
bDisabled | BOOL | TRUE = deselection of the function block |
Inputs/outputs
VAR_IN_OUT
stCom : ST_MBUS_Communication;
END_VAR
Name | Type | Description |
---|---|---|
stCom | This structure is used to link the function block FB_MBUSKL6781() with the meter blocks. |
Outputs
VAR_OUTPUT
bBusy : BOOL;
bReady : BOOL;
bError : BOOL;
eError : E_MBUS_ERROR;
dwIdNumber : DWORD;
byStatus : BYTE;
byGEN : BYTE;
byCounter : BYTE;
usiRecivedAdr : USINT;
eMedium : E_MBUS_Medium;
sMan : STRING(3);
strRelHumi : ST_MBus_Info;
strRelHumiMin : ST_MBus_Info;
strRelHumiMax : ST_MBus_Info;
strTemp : ST_MBus_Info;
strTempMin : ST_MBus_Info;
strTempMax : ST_MBus_Info;
strTempAvg1h : ST_MBus_Info;
strTempAvg24h : ST_MBus_Info;
END_VAR
Name | Type | Description |
---|---|---|
bBusy | BOOL | The bBusy output is TRUE as long as the meter is being read. |
bReady | BOOL | The bReady output is TRUE for one cycle, once meter reading is completed. |
bError | BOOL | This output goes TRUE as soon as an error occurs. This error is described via the eError variable. |
eError | This output outputs an error code in the event of an error. bError goes TRUE at the same time. | |
dwIdNumber | DWORD | Serial number of the meter (secondary address) |
byStatus | BYTE | Device status |
byGEN | BYTE | Software version of the device |
byCounter | BYTE | Number of times the master has accessed data of the respective slave |
usiRecivedAdr | USINT | Received primary address (0-250) |
eMedium | Medium | |
sMan | STRING | Manufacturer sign |
strRelHumi | Current relative humidity | |
strRelHumiMin | Lowest relative humidity since the last min/max reset command | |
strRelHumiMax | Highest relative humidity since the last min/max reset command | |
strTemp | Current temperature | |
strTempMin | Lowest temperature since the last min/max reset command | |
strTempMax | Highest temperature since the last min/max reset command | |
strTempAvg1h | 1-hour average value for temperature | |
strTempAvg24h | 24 hour average value for temperature |
Requirements
Development Environment | PLC library to include |
---|---|
TwinCAT from v3.1.4020.14 | Tc2_MBus from 3.3.5.0 |