
5/23
DATE
TITLE: PROFIBUS-DP Board OPERATOR’S MANUAL
I. Note about the number of available I/O module Units
II. Setting method of address mapping for PMC-SD7
04.11.04
DRAW.NO.
Add the following explanation to Section II.1.2.6 of B-62924EN/04 and Section 1.2.7 of B-62924EN04-1.
About the number of available I/O module units
The maximum number of I/O module units per slave station is determined by Slave
parameter length which can be calculated with the following expression.
Slave parameter length = 26 + [ 9 + USER PRM DATA length] (note)
+ [ 2 + CONFIG DATA length] (note)
+ SLAVE USER DATA length
=< 240 bytes
(note) If the value of […] is an odd number, make it an even number by adding
one to an original value.
The length of each parameter (USER PRM DATA, CONFIG DATA, SLAVE USER
DATA) can be got from PROFIBUS Slave parameter screen of CNC.
NOTE
· In case of series 6557 of CONTROL SOFTWARE
In addition to the above limitation, note the caution of page 26,
B-62924EN/04.
· In case of series 6558 of CONTROL SOFTWARE
The length of CONFIG DATA is not displayed on Slave parameter
screen.
So, count it, referring to “About CONFIG DATA of series 6558”
mentioned later.
Example
Case 1: USER PRM DATA length =157, CONFIG DATA length=46,
SLAVE USER DATA length=0
26 + [ 9 + 157 ] + [ 2 + 46 ] + 0 = 240 (Available)
Case 2: USER PRM DATA length =158, CONFIG DATA length=47,
SLAVE USER DATA length=0
26 + [ 9 + 158 (+1) ] + [ 2 + 47 (+1)] + 0 = 244 (Not available)