MKS 1579A, Instruction Manual

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Chapter 6: Operation (Profibus Units) 1579A/579A
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Status LED STS
A two-color LED, marked STS, between the D-connectors, reports basic status information of the
device. It is also used for setup and display of the PROFIBUS address.
LED Status Meaning
off No power or a severe fault
green Ready
green blinking Communication active
red Fault condition
red blinking Communication active but fault condition
green/red blinking Wink flag was triggered
blinking green/red at
power on Device passes test step of software
Address and Mode Switch A/B
This switch map serves for manually switching from analog mode to Profibus mode and there to
select the device’s address. In analog mode a mass flow controller needs an analog setpoint
signal!
If you are not familiar with the binary code refer to Appendix D how to convert decimal numbers.
Note: After changing any settings the unit must be restarted to store the new configuration.
Switch Assignment
Address Section Mode
ADDRESS B Top Label
0 0 0 0 0 0 0 Bus Switch Up Value
1 2 4 8 16 32 64 Analog Switch Down Value
0 1 2 3 4 5 6 A
Bottom Label
Figure 15: Address and Mode Switch Map A/B
Mode B
If the mode switch sets B mode, the device operates as PROFIBUS device. In that case the
address switches define the device PROFIBUS address. If the address switches are all down (127)
the internal programmed (via PROFIBUS) address is used. All other address switch settings define
the PROFIBUS address by hardware.