iHP Manual 75 | P a g e
4.5 Analog Control
The module’s output (output voltage or current) can be controlled using an external supply connected to the
modules’ IPROG (0-10VEXT_IPROG or 0-5VEXT_IPROG) or VPROG (0-10VEXT_VPROG or 0-5VEXT_VPROG)
signal. Definition of module is in Appendix B.2 Module Command. Definition of ISOCOMM Command is in
Appendix B.3 ISOCOMM Command.
4.5.1 Analog Voltage Source (AVS)
In this operating mode, the user has the capability to control the output voltage using analog means. For AVS,
user can control the output using the 0-5VEXT_VPROG or 0-10VEXT_VPROG input.
To change to Analog Voltage Source (AVS) mode, the user needs to send the below commands to ISOCOMM.
*Before writing to the ISOCOMM, please ensure that the ISOCOMM Command Write Protect (01h) is disabled.
Where: Data1 please refer to ISOCOMM Command Table.
Data2 “0x02h” signifies Analog Programmed Voltage Source.
After sending ISOCOMM Command D3h, the module will momentarily shutdown, re-initialize and restart. This
will happen for 1.5 seconds. Since the module will re-initialize, the Module Operational Command (01h) and
Module Write Protect Command (10h) will be set to enable. The module output voltage will be based on the
VPROG signal. Table 4-19 lists the status of the module command and the functionality of the commands when
configuring the module to DCS mode.
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