SECTION 2 CompoWay/F Communications Protocol
18
• Timer and Counter Number Specifications
There is more than one timer and more than one counter, and so the
leftmost two digits of the address are used to specify the applicable
timer or counter. The timer and counter numbers and corresponding
addresses are given in the following table.
● Reading Comparators
RS-485 communications can be used to read the variable area and
perform comparisons with the following three types of comparators.
1. Analog Comparators: Compare an analog input with a constant or
two analog inputs.
2. Comparators: Compare the present value of a timer, holding timer,
or counter with a constant or the present values of timers, holding
timers, or counters.
3. Eight-digit comparators: Compare the present value of an 8-digit
comparator with a constant.
Note: Refer to ntlp: 3-10 Analog Inputs (Analog Comparators (A)), 3-
11 Comparing Timer/Counter Present Values Using Compar-
ators (P), and 3-12 Comparing the 8-Digit Counter (F) Present
Value Using 8-Digit Comparators (G) in the ZEN Programmable
Relay Operation Manual for details on comparators.
• Comparator Number Specifications
There is more one of some types of comparators and more than one
analog input, and so the leftmost two digits of the address are used to
specify the applicable timer or counter. The comparator and analog
input numbers and corresponding addresses are given in the following
table.
Contents Type/number
Variable
type
Addresses
Timer PV T0 to Tf (16 timers) C0 0000 to 0F00
Timer type and time unit C0 00
01 to 0F01
Timer SV C1 00
00 to 0F00
Holding timer PV #0 to #7 (8 timers) C0 00
03 to 0703
Holding timer type and time unit C0 00
04 to 0704
Holding timer SV C2 00
00 to 0700
Weekly timer operation mode @0 to @f (16 timers) C0 00
0B to 0F0B
Weekly timer SV C5 00
00 to 0F00
Calendar timer SV *0 to *f (16 timers) C6 00
00 to 0F00
Counter PV C0 to Cf (16 counters) C0 00
06 to 0F06
Counter SV C3 00
00 to 0F00
Contents Type/number
Variable
type
Addresses
Analog input PV I4 and I5 C0 I4: 00
0D
I5: 010D