HEIDENHAIN SHB Data Interfaces for HEIDENHAIN User Manual
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HEIDENHAIN Service Manual for Data Interfaces
Machine parameters for blockwise transfer
With Blockwise Transfer in the "Program Run" operating mode, machine programs - in general
created on a remote computer-aided workstation - of any desired length can be downloaded and
machined via the serial interface.
Blocks already machined are deleted from the memory and the next program blocks requested
from the external memory.
With BLOCKWISE TRANSFER the data flow is not stopped by RTS or DC3, but only by the
control characters ACK (acknowledge = positive) and NAK (not acknowledge = negative).
Each transferred block is checked by means of a BCC (block check character), i.e. the received
data are checked for longitudinal parity. If both values are the same, positive acknowledgment
is transmitted; if they are not identical, negative acknowledgment is transmitted.
This block is repeated up to three times. If the result is negative in each case, data transfer is
aborted and an error message generated.
For MP 218 (5010.1) and MP 219 (5010.2)
H = HEIDENHAIN conversational program
D = ISO program
M = Machine parameter list
P = PLC program
S = Non-linear compensation list
X99999967 = For all programs stored in the ME mode