industrialNETworX

Hi,

I'm using VARAN HAL V1.1.1.0 and have a question connected to the PLL synchronization. I have a test equipment with a manager and slave. On a first look, the communication is ok. Now I want to check if the PLL synchronization is succesful, therefore I want to read the PLL status register. According to the VARAN design specification it's content is the following:

PLL Status Register

• Bit 0:PLL locked
• Bit 1: PLL unlock (reset on readout)
• Bit 2: Device Delay Time Compensated
• Bit 3: Delta Regulation Enable (Read back to check if option is available)
• Bit 4: Sync Divider enable (Read back to check if option is available)
• Bit 5: IRQ watch dog enable
• Bit 6: PLL enable
• Bit 7: System period overwrite via sync_time allowed

In my code I use the following line to read the PLL status register:

VaranClient_GetParameter( VRNCLNT_PARAMETER_PLL_LOCKED_STAT, &ulSyncPllLockedStat );

The value of ulSyncPllLockedStatis 0x1 (that means PLL locked). When I disconnect the Ethernet cable from the Manager, the value of ulSyncPllLockedStat becomes 0x0.

This looks correct, but why bit 6 is not set? What about the other bits?

So my real question is what I have to expect - all bits according to the VARAN design specifications are supported or only some of them? I'm not sure whether the Slave has a problem to be synchronized or some bits in the PLL status register are not supported...

A little help, please...