Service request is a message generated by the ZUP power supply to interrupt the controller. SRQ
can be generated by a power supply fault condition.
Each of the following conditions can generate SRQ message:
1. Over Voltage Protection (OVP).
2. Over Temperature Protection (OTP).
3. Foldback Protection.
The operator decides which of the conditions are defined as faults. Enabling or disabling a condition
from generating SRQ message does not affect the condition within the power supply.
The service request message consists of three characters terminated by EOS<CR><LF>.
The first character identifies the SRQ cause: 1-Foldback , 2-OVP , 3-OTP.
The 2’nd and 3’rd characters identify the ZUP power supply address.
Example: String generated by a ZUP unit :120<CR><LF> , means foldback protection was activated
in power supply address 20.
5.7
SERVICE REQUEST
5.7.1 Service Request (SRQ)
5.7.2 Service Request message
5.7.3. Service request enable/disable commands
49
#
Command
Description
1
:SRVn;
Enable or disable OVP service request.
:SRV1; Enable OVP service request.
:SRV0; Disable OVP service request.
2
:SRV?;
Returns QV followed by the OVP service request status.
:QV1; OVP service request enabled.
:QV0; OVP service request disabled.
3
:SRTn;
Enable or disable OTP service request.
:SRT1; Enable OTP service request.
:SRT0; Disable OTP service request.
4
:SRT?;
Returns QT followed by the OTP service request status.
:QT1; OTP service request enabled.
:QT0; OTP service request disabled.
5
:SRFn;
Enable or disable Foldback protection service request.
:SRF1; Enable Foldback protection service request.
:SRF0; Disable Foldback protection service request.
6
:SRF?;
Returns QF followed by the Foldback protection service request status
:QF1; Foldback protection service request enabled.
:QF0; Foldback protection service request disabled.
