324
Communications Transfer Rates
Reads minimum 20mS and writes minimum 200mS.
Supported Function Codes
n
Bluetooth port 20 and 21
n
RS485 and Ethernet ports 1, 2, 3, 4, 6, 8, 16, 17, 20, 21
Communications Modes of Operation
When the Shed Timer is enabled and a write or override occurs the
controller will enter Slave Mode. The keypad is locked from the
operator. The purpose of this mode is that if communications is lost
and the shed timer times out then the controller will enter a known
state of operation. The configuration of the “Shed Mode and Output”
and Shed Setpoint Recall are used to configure the controller’s shed
state. While in Slave Mode pushing the Man Auto key enters
Emergency Manual mode. The local operator then has control of the
output. The controller is in Monitor Mode if the Shed timer is
disabled.
Reading Control Data
The following control data can be read from the controller:
n
Input 1
n
Input 2
n
PV, SP, Output
Register Addresses
Use the identifying codes listed in the following table to read the
specific items.
A Write request for these codes will result in an Error message.
Table 11-6: Control Data Parameters
Parameter
Description
Register Address
Data
Type
Access
Data Range or Enumerated
Selection
Hex Decimal
Input #1 190 400 FP RD In Engineering Units or
Percentage
Input #2 191 401 FP RD In Engineering Units or
Chapter 11 - Modbus RTU Function Codes 20&21
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