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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
338
Operating Instructions, 08/2017, A5E37367739-AC
A.9.14
Communication
A.9.14.1
Service channel
Table A- 141 Service channel
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
9594
Unsigned / 2 USB mode
Returns the USB
mode.
-
•
0: USB communica-
tion
•
1: Mass storage
device (MSD)
Read
only
9595
Unsigned / 2 Auto mode
Automatically connect-
ed as MSD when USB
cable is plugged.
-
•
0: Disabled
•
1: Enabled
Read /
write
9596
Unsigned / 2 MSD connect
Command to connect /
disconnect to PC.
-
•
0: Cancel
•
1: Connect
•
2: Disconnect
Write
only
A.9.15
Security
A.9.15.1
Access management
Table A- 142 Access management
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
8292
Unsigned / 2 User PIN
Input of user PIN.
-
-
Write
only
8293
Unsigned / 2 Expert PIN
Input of expert PIN.
-
-
Write
only
8294
Unsigned / 2 Access level
Granted access level. -
•
16: Read only
•
32: User privilege
•
64: Expert privilege
Read
only
6169
Unsigned / 2 New user PIN
Input to change user
PIN.
-
-
Write
only
6170
Unsigned / 2 New expert PIN Input to change expert
PIN.
-
-
Write
only
(Expert)