Doc# E107706 9- 15
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9: External I/O Modules
The Modbus Map for the KYZ Pulse Output Module (and operating details) can be
found in the Modbus Communicating I/O Modules Manual.
NC = Normally Closed; NO = Normally Open; C = Common.
9.8.2: Communication
Maximum registers per request, read or write, is 4 registers.
The device will operate with the following Default Mode Parameters. See Section 9.4
for details.
Address: 247 (F7H)
Baud Rate: 57600 Baud
Transmit Delay Time: 20 msec
9.8.3: Normal Mode
Energy readings are given to the device frequently. The device generates a pulse at
each channel after a certain energy increase.
Normal Operation consists of three processes:
1. The first process accepts writes to registers 04097 - 04112. Writes can be up to
four registers long and should end on the fourth register of a group (register
04100, or registers 04103-04112 or registers 04109-04112). These writes can be
interpreted as two-byte, four-byte, six-byte or eight-byte energy readings. The
reception of the first value for a given channel provides the initial value for that
channel. Subsequent writes will increment the Residual for that channel by the
difference of the old value and the new value. The previous value is then replaced
with the new value. Attempting to write a value greater than the programmed
Rollover Value for a given channel is completely ignored and no registers are modi-
fied. If the difference is greater than half of the programmed Rollover Value for a
given channel, the write does not increment the Residual but does update the Last
Value. Overflow of the Residual is not prevented.
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