Watson-Marlow MM440 - Manual (Page 157)

Issue 10/06 3 Functions
MICROMASTER 440 Operating Instructions
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read at once from an “indexed” parameter (refer to "Index", special setting, index =
255). This setting to variable word-length is made during start-up. (refer to
parameter P2013).
Parameter ID (PKE) 1st word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit No.:
AK
SP
M
PNU1
Parameter index (IND) 2nd word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit No.:
PNU2 RES TXT Index
Parameter value (PWE)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit No.:
Parameter value, high (PWE1) 3rd word
Parameter value, low (PWE2) 4th word
The following applies:
¾
AK Task or reply ID
¾ SPM Toggle bit for processing of parameter-change reports
(MICROMASTER does not support this, SPM = 0)
¾ PNU Parameter number
¾ RES Reserved
¾ TXT Read / write from parameter text
(MICROMASTER does not support this, TXT = 0)
CAUTION
¾
Do not use a variable word length if SIMATIC S5 or SIMATIC S7 is the master.
¾ This setting must be made both at the master as well as at the slave – and
cannot be changed while the bus is operational.
NOTE
¾
The PKW area is transferred in increasing order, always starting with the 1st
word.
¾ Reserved fields or functions that are not supported should be specifically pre-
assigned zero in the master implementation.
¾ The bit 11 (SPM) is the toggle bit for parameter change reports. Parameter
change reports when reading/writing parameter texts are not supported by
MICROMASTER.