QUESTION:
How can I transfer an NC block (traversing program) by user program to an FM353 / FM354?

ANSWER:
In order to transfer a new or modified NC block to an FM 353 / FM 354 you program the Write job "Change parameters/data" in your user program.
Below is an example of how to assign the data record for transferring new NC blocks.

Assigning the user data block for transferring NC blocks:

The structure of the data record for the Write job "Change parameters/data" consists of

• A data record header (in the manual: system data "Change parameters/data") and
• The NC block (in the manual: system data "Active NC block").

For transferring the NC block

• N20 G90 X400.000 [mm] F5000.000 [mm/min] M20

to traversing program no. 2 you have the following assignment in the user data block:

Address in the user DB	Name	Type	Value	Comment
Data record header
DBB 196	PAR_CHAN.TYP	BYTE	B#16#04	DB type: 4, traversing program
DBB 197	PAR_CHAN.NUMB	BYTE	B#16#02	Program no. 2
DBB 198	PAR_CHAN.COUN	BYTE	B#16#14	NC record no.: 20
DBB 199	PAR_CHAN.JOB	BYTE	B#16#02	Job type: 2, write parameters
NC block
DBB 200	PAR_CHAN.DATA[200]	BYTE	B#16#02	Program no. 2
DBB 201	PAR_CHAN.DATA[201]	BYTE	B#16#14	NC block no.: 20
DBX 202.0		BOOL	TRUE	Enable bit for G function group 1
DBX 202.1		BOOL	FALSE	Enable bit for G function group 2
DBX 202.2		BOOL	FALSE	Enable bit for G function group 3
DBX 202.3		BOOL	FALSE
DBX 202.4		BOOL	TRUE	Enable bit for Position / Dwell time
DBX 202.5		BOOL	FALSE	Enable bit for subprogram no.
DBX 202.6		BOOL	FALSE	Enable bit for number of subprogram calls
DBX 202.7		BOOL	FALSE	Enable bit for skippable block
DBX 203.0		BOOL	TRUE	Enable bit for speed
DBX 203.1		BOOL	TRUE	Enable bit for M function group 1
DBX 203.2		BOOL	FALSE	Enable bit for M function group 2
DBX 203.3		BOOL	FALSE	Enable bit for M function group 3
DBX 203.4		BOOL	FALSE	Enable bit for tool offset no.
DBX 203.5		BOOL	FALSE
DBX 203.6		BOOL	FALSE
DBX 203.7		BOOL	FALSE
DBB 204	PAR_CHAN.DATA[204]	BYTE	B#16#5A	G function 1: 90
DBB 205	PAR_CHAN.DATA[205]	BYTE	B#16#00	G function 2:
DBB 206	PAR_CHAN.DATA[206]	BYTE	B#16#00	G function 3:
DBB 207	PAR_CHAN.DATA[207]	BYTE	B#16#00
DBD 208		DINT	L#400000	Position in the MSR unit [µm]
DBD 212		DINT	L#5000000	Speed in the MSR unit / min
DBB 216	PAR_CHAN.DATA[216]	BYTE	B#16#14	M function 1: 20
DBB 217	PAR_CHAN.DATA[217]	BYTE	B#16#00	M function 2:
DBB 218	PAR_CHAN.DATA[218]	BYTE	B#16#00	M function 3:
DBB 219	PAR_CHAN.DATA[219]	BYTE	B#16#00	Tool offset no.

Table 1: Assignment of the data record structure for transferring an NC block

Notes on the user block:

• Program no. and record no. are to be entered in the data record header and in the NC block.
• An NC block must always be completely specified.
• There is an enable bit and an input field for each block element of an NC record. For unused block elements you must set the enable bit and input field to "0" (see "Block structure" traversing blocks for a description of the block elements).
• The position and speeds are to be specified in the unit of the measuring system. The following holds for the NC block above:
  input via traversing program editor:
  N20 G90 X400.000 [mm] F5000.000 [mm/min] M20
  input via user DB:
  N20 G90 X400000 [µm] F5000000 [µm/min] M20

Procedure for transferring an NC block from the user program to an FM 353/354:

1. Transferring the new data into the data record DBB 196 ... DBB 219.
2. Executing the Write job by setting the trigger bit DBX39.3.

Error evaluation:

If the module detects a data error, this is reported via the bit DBX 22.4 (data error). The cause of the error is entered in bytes DBB 94 (error class) and DBB 95 (error number).

Note:
The description applies for the standard blocks of the configuration package for FM 353 / FM 354, from version V3.1.

More information on the user data block and traversing blocks is available in the manual FM 353 - Entry ID 2106357 and FM 354 - Entry ID 2110628:

- Structure of the user data block	section 6.5
- System data "Change parameters/data"	section 9.3.1
- System data "Active NC block"	section 9.3.12
- Traversing blocks "Block structure"	section 10.1