Interrogating The Plc Status - Siemens SINUMERIK 840Di sl Operating Manual

8
01/2008
8.6

Interrogating the PLC status

Inputs:
Outlets:
Bit memories:
Timers:
Counters:
data:
Format:
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
Function
You can obtain information about the current states of the following
memory locations of the PLC and change them if necessary:
Input bit (Ex), input byte (EBx)
Input word (Ewx), input double word (Edx)
Output bit (Ax), output byte (Abx)
Output word (Awx), output double word (Adx)
Memory bit (Mx), memory byte (MBx)
Memory word (MWx), memory double word (MDx)
Time (Tx)
Counter (Cx)
Data block (DBx), data bit (DBxx), data byte (DBBx),
data word (DBWx), data double word (DBDx)
B = binary
H = hexadecimal
D = decimal
G = floating comma (for doublewords)
Operand Example Read
Yes
Inputs
I 2.0
IB 2
Yes
Outputs
Q20.1
QB 20
Yes
Bit memory
M 60.7
MB60
MW 60
T20 Yes
Timers
C20 Yes
Counter
instructions
Yes
DB /
Data byte
DB3.DBB9
Diagnostics operating area
8.6 Interrogating the PLC status
Write Format Value
Yes
B 0
B 0101 1010
H 5A
D 90
Yes
B 1
B 1101 0110
H D6
D 214
Yes
B 1
B 1101 0110
H B8
D 180
No
B
H
D
Yes
B
H
D
Yes
H A
D 10
B 000 0000 0000 1010
8
Range
0-127
0-127
0-255
0-31
0-31
0-255
0-255
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