KROHNE H250 M40 PROFIBUS PA - Manual (Page 10)

4
COMMISSIONING / OPERATION
10
H250 M40 ESK4
www.krohne.com 03/2014 - 4002251801 - AD H250/M40 PROFIBUS R01 en
Commissioning / Operation
4.1 Hardware settings
A hardware switch is available at the ESK4-PA module to set the PROFIBUS station address as
well as to activate a hardware write protection. It is realized by a switch with 8 separate
switches.
The actual station address is calculated by adding the corresponding values shown in the
diagram above. Each value depends on the setting of its corresponding switch. Default setting
for each switch is “off”; i.e. write protection is disabled and station address set to an invalid value
(127).
According to the PROFIBUS PA Profile 3.02 the following rules are considered in conjunction
with the hardware switch:
1 Power supply D / D-
2 Hardware switch
3 Connection to basic module
Function Value (off) Value (on) Label
Write protection disabled enabled WP
Station address + 64 + 0 64
+ 32 + 0 32
+ 16 + 0 16
+ 8 + 0 8
+ 4 + 0 4
+ 2 + 0 2
+ 1 + 0 1
AD_H250_M40_PB_PA_R01_en_4002251801_PRT.book Page 10 Friday, March 21, 2014 1:14 PM