Watlow RMA PLUS RMAP-AA Series, User Manual

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Version 1.0 PN: 2042-8198
Page 72 of 75 DN: 10-32813
This feature is only available if the model number is RMAP- 2 AXX-XXXX.
This key is used to enable Modbus® RTU Function Code 6 (Write Single Register) on master channels for
devices that do not implement Modbus® Function Code 16 (Write Multiple Registers). It is only
necessary if the RMA PLUS does not negotiate this requirement on its own.
It is a Boolean option, false (0) by default. This record is not a member of the default file, and therefore,
the feature is disabled. If you wish to use this feature, you must add this record to the setup file. Refer
to the following table:
Value Action
0 (FALSE) Master uses Function Code 16 exclusively
1 (TRUE) Master uses Function Code 6 for single register writes
See Modbus RTU .
Busses
The RMA PLUS must be a master on a given bus to acquire data. It is a master by default on Watbus
(bus 1 and 2). It may optionally be a master on Modbus® RTU (bus 4 and 5) if configured by the user.
Bus 0:
Nothing
Disregard entry. This tells the file parser to disregard this entry / record.
Bus 1: High-Speed Watbus (AKA Inter-Module Bus)
This is the preferred bus for accessing data. It is the fastest and most efficient bus available. Any EZ-
ZONE RM (9+) module may be connected to this bus.
IMPORTANT: Do not attempt to access the Subroutine class (0x05) or Profile Step class (0x15) from high-
speed Watbus. This will cause unpredictable results due to timing restrictions.
Bus 2: Low-Speed Watbus (AKA Standard Bus)
This bus is used to access legacy EZ-ZONE devices that do not support high-speed Watbus: EZ-ZONE RM,
PM (15+). Do not use this bus if bus 1 is available. NOTE: The EZ-ZONE ST and RUI do not currently
implement the required services necessary to talk to the RMA PLUS.
Bus 4, 5: Modbus® RTU Master
If the model number is RMAP- 2 AXX-XXXX, then the device will have a card in the adjacent slot that
provides two additional serial ports for connection to Modbus® RTU devices via RS-232 or RS-485. Bus 4
goes with Modbus® instance 6. Bus 5 goes with Modbus® instance 7.
Data Types
The following table lists the data types (representation) and associated value necessary for some
configuration file records.
Data Type Value Description
UINT8
1 Unsigned 8-bit Integer
SINT8
2 Signed 8-bit Integer
UINT16 3 Unsigned 16-bit Integer
SINT16 4 Signed 16-bit Integer
UINT32
5 Unsigned 32-bit Integer
SINT32 6 Signed 32-bit Integer
ENUM8 7 Enumeration (8-bit)