Tyco 1540 - Manual (Page 62)

Relay Pulse Width is the width of the relay pulse in multiples of 20 ms. However, only values of
3 (60 ms), 5 (100 ms) or 10 (200 ms) are supported. Writing any other value will cause an error
to be returned.
Reset Energy is used to reset the Energy readings. A value of zero must be written to this
register to accomplish this. Writing any other value will cause an error to be returned.
Pulse Rate Divisor, supports only values of 1,10,100 or 1000. Writing any other value will cause
an error to be returned.
System Power, is the maximum system power based on the values of system type, system volts
and system current.
Register Order, the instrument can receive or send floating-point numbers in normal or reversed
register order. In normal mode, the two registers that make up a floating point number are sent
most significant bytes first. In reversed register mode, the two registers that make up a floating
point number are sent least significant bytes first. To set the mode, write the value '2141.0' into
this register - the instrument will detect the order used to send this value and set that order for
all Modbus transactions involving floating point numbers.
Secondary Volts indicates the voltage on the VT secondary when the voltage on the Primary is
equal to the value of System Volts . The value of this register can be set to between the
minimum and maximum instrument input voltage.
6.3 RS485 Implementation of Johnson Controls Metasys
These notes explain Metasys and Crompton Instruments Integra 1000/1540 integration. Use
these notes with the Metasys Technical Manual, which provides information on installing and
commissioning Metasys N2 Vendor devices.
Application details
The Integra 1000/1540 is a N2 Vendor device that connects directly with the Metasys N2 Bus.
This implementation assigns 33 key electrical parameters to ADF points, each with override
capability.
Components requirements
• Integra 1000/1540 with RS485 option.
• N2 Bus cable.
Metasys release requirements
• Metasys OWS software release 7.0 or higher.
• Metasys NCM311. NCM360.
60 Integra 1540, 1000, 0640, 0440, 0340, 0240 Issue 1 04/03