Pfeiffer Vacuum HILOBE 1004, Operating Instructions Manual

Page: 34 / 68

a2 – a0 Unit address for slave
● Individual address of the unit ["001";"255"]
● Group address "9xx" for all identical units (no response)
● Global address "000" for all units on the bus (no response)
* Action according to telegram description
n2 – n0 Pfeiffer Vacuum parameter numbers
I1 – I0 Data length dn to d0
dn – d0 Data in the respective data type (see chapter “Data types”, page 35) .
c2 – c0 Checksum (sum of ASCII values of cells a2 to d0) modulo 256
C
R
carriage return (ASCII 13)
6.3.2 Telegram description
Data query --> ?
a2 a1 a0 0 0 n2 n1 n0 0 2 = ? c2 c1 c0 c
R
Control command --> !
a2 a1 a0 1 0 n2 n1 n0 l1 l0 dn ... d0 c2 c1 c0 c
R
Data response / Control command understood -->
a2 a1 a0 1 0 n2 n1 n0 l1 l0 dn ... d0 c2 c1 c0 c
R
Error message -->
a2 a1 a0 1 0 n2 n1 n0 0 6 N O _ D E F c2 c1 c0 c
R
_ R A N G E
_ L O G I C
NO_DEF Parameter number n2–n0 no longer exists
_RANGE Data dn–d0 outside the permissible range
_LOGIC Logical access error
6.3.3 Telegram example 1
Data query
Current rotation speed (parameter [P:309] , device address slave: "123")
--> ? 1 2 3 0 0 3 0 9 0 2 = ? 1 1 2 c
R
ASCII 49 50 51 48 48 51 48 57 48 50 61 63 49 49 50 13
Data response: 633 Hz
Current rotation speed (parameter [P:309] , device address Slave: "123")
--> 1 2 3 1 0 3 0 9 0 6 0 0 0 6 3 3 0 3 7 c
R
ASCII 49 50 51 49 48 51 48 57 48 54 48 48 48 54 51 51 48 51 55 13
6.3.4 Telegram example 2
Control command
Switch on the pumping station (parameter [P:010] , device address Slave: "042"
--> ! 0 4 2 1 0 0 1 0 0 6 1 1 1 1 1 1 0 2 0 c
R
ASCII 48 52 50 49 48 48 49 48 48 54 49 49 49 49 49 49 48 50 48 13
Control command understood
Switch on the pumping station (parameter [P:010] , device address Slave: "042"
Interfaces
34/66