Hello,
According to the data sheet for the DZ60, the internal low power oscillator may have a period between the limits 0.7 to 1.3 milliseconds. When this is used as the source for the COP timer, and using the shortest threshold setting, the COP timeout period should lie somewhere between 22 and 42 ms. Since there doesn't appear to be a published temperature curve for the oscillator, it is unclear whether these limits would apply over the full range of temperatures.
If it is important for your application that the COP timeout period be more closely controlled, you will need to alternatively consider the bus frequency as the COP timeout source. Refer to table 5.6 in the data sheet.
Regards,
Mac