10
Time synchronization between multiple
PTC901 meters can be accomplished through a
hardware interface on the Real-Time Clock option
card. This RS485 type interface allows connection
of up to 32 PTC901 meters in a two-wire
multidrop network, at distances up to 4000 ft.
In a synchronization network, one PTC901
meter is programmed as the Host, while all other
meters are programmed as Slaves. Once every
hour, the Host meter outputs a time
synchronization pulse onto the network. Upon
receiving the synchronization pulse, each Slave
meter automatically adjusts the minutes and
seconds of its RTC Time setting to synchronize
with the Host.
Real-Time Clock Synchronization Figure
4.6 REAL-TIME CLOCK WIRING (PTC901)
5.0 R
EVIEWING THE
F
RONT
B
UTTONS AND
D
ISPLAY
* Cycle counter and Real-Time Clock displays are locked out in Factory Settings.
** Factory setting for the F1 and F2 keys is NO mode.
*** Factory setting for the RST key is
(Reset Display)
Selects digit location in parameter values
Reset (Function key) ***
RST
Decrement selected parameter value or selections
Function key 2; hold for 3 seconds for Second Function 2 **
F2
Increment selected parameter value or selections
Function key 1; hold for 3 seconds for Second Function 1 **
F1
Store selected parameter and index to next parameter
Access Programming Mode
PAR
Exit programming and return to Display Mode
Index display through Timer, Cycle Counter, Date, and Time
DSP
PROGRAMMING MODE OPERATION
DISPLAY MODE OPERATION
KEY
