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Device manual 6490B / 6490B-y / 6590B
W. Bälz & Sohn GmbH & Co. Koepffstraße 5 D-74076 Heilbronn Telefon (07131) 1500-0 Telefax (07131) 1500-21
3.29 Important information about setting t.P in coherence with Y.SY at 6490B(-y)
Setting the valve actuating time t.P has got a very important meaning. It has to be ascertained as
exact as possible for each valve and set to the controller. A bad valve actuating time causes a wrong
manipulated variable (see 3.6 actuating time t.P).
3.30 Baud rate for *serial interface at 6x90B(-y) /3 /4 /4-i bd
Serial interface RS 485, data transmission according to modbus protocol in RTU-mode.
Selection:: 0 19200 baud 2 4800 baud
1 9600 baud 3 2400 baud
If the baud rate is selected via front keyboard, the new setting is active immediately. A reset is not necessary.
If the baud rate is changed via modbus, a reset (power off-power on) is necessary.
3.31 Address of *serial interface at 6x90B(-y) /3 /4 /4-i Adr
Defines the modbus address of the controller.
Setting range: 1 to 247
If the address is selected via front keyboard, the new setting is active immediately. A reset is not necessary.
If the address is changed via modbus, a reset (power off-power on) is necessary.
3.32 *Serial communication at 6x90B(-y) /3 /4 /4-i S.C
Selection: 0 Operation of the controller via front keyboard and modbus-master is possible.
1 Operation of the controller is only possible via modbus-master except configuration point S.C.
3.33 Second operating level OL.2
The second operating level is only active if PAS = 1 (see below 3.34 PAS).
Select functions for the user-defined operating level.
Setting range: 0 to 255:
0 No second operating level
1 Optimisation (see also 3.1 OPt) can be activated in the second operating level
2 Alarm functions and their hysteresis (see also 3.7 Alarms) can be entered in the second
operating level
4 Reserved, no function yet
8 Second setpoint SP.2 (see also 3.11 SP.2) can be adjusted in the second operating level
16 Setpoint ramp SP.r (see also 3.12 SP.r) can be adjusted in the second operating level
To activate the various functions above, the index numbers on the left side have to be added and the result of it
has to be entered.
The index numbers 4, 32, 64, 128 are reserved and have no function yet. If one or more exclusively reserved
index numbers are adjusted, only Cod will be displayed in the second operating level.
3.34 Access to the configuration level PAS
Selection: 0 No interlocking of the configuration level,
OL.2 is ineffective.
1 Access to the configuration level only by entry via password,
OL.2 is effective
(see above 3.33 OL.2; valid password see 9. Overview of configuration level at
password PAS).
* option
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