Siemens SINUMERIK 840D sl Function Manual page 921

If an error occurs during communication with a machine control panel (MCP) or handheld unit
(HHU), the following alarms are displayed on the HMI and the input signals (MCP1In, MCP2In
or BHGIn) are set to the value zero:
Error case: MCP / HHU (840D sl)
● Alarm 400260: "MCP 1 failure"
● Alarm 400261: "MCP 2 failure"
● Alarm 400262: "HHU failure"
If resynchronization is possible between PLC and MCP/HHU, communication is resumed, the
error message on the HMI is deleted by the basic program, and process values are transferred
to the input signals (MCP1In, MCP2In or BHGIn) again.
Example: FB1 call in OB100 (840D sl)
ORGANIZATION_BLOCK OB100
VAR_TEMP
END_VAR
BEGIN
// INSERT USER PROGRAM HERE
END_ORGANIZATION_BLOCK
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
OB100_EV_CLASS :
OB100_STRTUP :
OB100_PRIORITY :
OB100_OB_NUMBR :
OB100_RESERVED_1 :
OB100_RESERVED_2 :
OB100_STOP :
OB100_RESERVED_3 :
OB100_RESERVED_4 :
OB100_DATE_TIME :
CALL FB1, DB7(
MCPNum :=
MCP1In :=
MCP1Out :=
MCP1StatSend :=
MCP1StatRec :=
MCP1BusAdr :=
MCP1Timeout :=
MCP1Cycl :=
NC-CyclTimeout :=
NC-RunupTimeout :=
P3: Basic PLC program for SINUMERIK 840D sl
BYTE ;
BYTE ;
BYTE ;
BYTE ;
BYTE ;
BYTE ;
WORD;
WORD;
WORD;
DATE_AND_TIME;
// FB1 call, instance DB: DB7
1,
P#E0.0,
P#A0.0,
P#A8.0,
P#A12.0,
6,
S5T#700MS,
S5T#200MS,
S5T#200MS,
S5T#50S);
13.17 Block descriptions
921