16
5.4 Communications Setup
Table 5-4 Communications Setup Registers
Parameter Add-
ress
Size,
byte
Direc-
tion
Range
Reserved 2344 2 R Read as 65535
Interface 2345 2 R/W 2 = RS-485 (not
changeable)
Address 2346 2 R/W 1 to 247
Baud rate 2347 2 R/W 0 = 110 bps
1 = 300 bps
2 = 600 bps
3 = 1200 bps
4 = 2400 bps
5 = 4800 bps
6 = 9600 bps
7 = 19200 bps
Data format 2348 2 R/W 1 = 8 bits/no parity
2 = 8 bits/even parity
When changing the instrument address, baud rate or data format, the new communications
parameters will take effect 100 ms after the instrument responds to the master’s request.
5.5 Reset/Synchronization Registers
Table 5-5 Reset/Synchronization Registers
Register function Add-
ress
Size
byte
Direc-
tion
Reset
value
Clear total energy registers (E) 3404 2 W 0
Clear total maximum demand
registers
3405 2 W 0 = all maximum
demands
1 = power demands (E)
2 = volt/ampere
demands
Reserved 3406- 2
3407
Clear event/time counters (E) 3408 2 W 0 = all counters
1-4 = counter #1 - #4
Clear Min/Max log 3409 2 W 0
Reserved 3410- 2
3419
Synchronize power demand
interval (E)
c
3420 2 W 0
c
1) If the power demand period is set to External Synchronization (see Table 5-2), writing a
zero to this location will simulate an external synchronization pulse denoting the start of the next
demand interval. The synchronization requests should not follow in intervals of less than 30
seconds, or the request will be rejected.
2) If the power demand period is specified in minutes, writing a zero to this location provides
synchronization of the instrument’s internal timer with the time of reception of the master’s request. If the
time expired from the beginning of the current demand interval is more than 30 seconds, the new demand
interval starts immediately, otherwise synchronization is delayed until the next demand interval.
(E) - available in the PM130E
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