JOHNSON CONTROLS
160
Form 150.63-NM9
Issue date: 5/20/2021
SECTION 10 – MAINTENANCE
BACnet, Modbus, and YorkTalk 2
Communications
Data can be read and in some cases modified using a
serial communication BACnet, Modbus or YorkTalk 2
network connection. This information allows commu-
nications of chiller operating parameters and external
control changes to setpoint, load limiting, and start/
stop commands.
BACnet and YorkTalk 2 RS485 networks are wired to
the + and - terminals of TB1 for port 1 communica-
tions. Modbus network connection has the option of
RS232 or RS485 connection for port 2 communica-
tions. Modbus network is wired to either TB2 or TB3
as follows:
• RS-485: connect to TB2 - Network (-1) to TB2
(-1); Network (+1) to TB2 (+1)
• RS-232: connect to TB3 - Network (RX) to TB3
(TXD); Network (TX) to TB3 (RXD); Network
(GND) to TB3 (GND)
See Figure 46 on page 161 for TB1, TB2 and TB3
locations.
In most cases, communication parameters will need to
“Values Required
for BAS Communication” lists setup parameters for the
available protocols. Modification is accomplished by
pressing the PROGRAM, DOWN ARROW, DOWN
ARROW, DOWN ARROW, DOWN ARROW, and
ENTER keys in sequence. The list below shows the
displays for the values that may be modified:
DE MODIFIER ADDRESS
XXXXX
DE MODIFIER OFFSET
XX
P1 PROTOCOL
XXXXXX
P1 MANUAL MAC
ADDRESS XXX
P1 BAUD RATE
XXXXX
P1 PARITY
XXXXX
P1 STOP BITS
X
P2 PROTOCOL
XXXXXXXXXX
P2 MANUAL MAC
ADDRESS XXX
P2 BAUD RATE
XXXXX
P2 PARITY
XXXXX
P2 STOP BITS
X
P2 HW SELECT BIT
XXXXX
REAL TIME ERROR ##
RESET 1 = YES, 0 = NO 0
Note:
See Table 34 for error descriptions
Summary of Contents for YCUL0020
Page 4: ...JOHNSON CONTROLS 4 Form 150 63 NM9 Issue date 5 20 2021 THIS PAGE IS INTENTIONALLY LEFT BLANK...
Page 10: ...JOHNSON CONTROLS 10 Form 150 63 NM9 Issue date 5 20 2021 THIS PAGE IS INTENTIONALLY LEFT BLANK...
Page 14: ...JOHNSON CONTROLS 14 Form 150 63 NM9 Issue date 5 20 2021 THIS PAGE IS INTENTIONALLY LEFT BLANK...
Page 40: ...JOHNSON CONTROLS 40 Form 150 63 NM9 Issue date 5 20 2021 THIS PAGE IS INTENTIONALLY LEFT BLANK...
Page 53: ...JOHNSON CONTROLS 53 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 55: ...JOHNSON CONTROLS 55 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 57: ...JOHNSON CONTROLS 57 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 59: ...JOHNSON CONTROLS 59 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 61: ...JOHNSON CONTROLS 61 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 63: ...JOHNSON CONTROLS 63 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 65: ...JOHNSON CONTROLS 65 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 67: ...JOHNSON CONTROLS 67 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 69: ...JOHNSON CONTROLS 69 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 71: ...JOHNSON CONTROLS 71 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 73: ...JOHNSON CONTROLS 73 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 75: ...JOHNSON CONTROLS 75 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 77: ...JOHNSON CONTROLS 77 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 79: ...JOHNSON CONTROLS 79 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 81: ...JOHNSON CONTROLS 81 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 83: ...JOHNSON CONTROLS 83 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 85: ...JOHNSON CONTROLS 85 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 87: ...JOHNSON CONTROLS 87 Section 5 Technical data Form 150 63 NM9 Issue date 5 20 2021 5...
Page 177: ...JOHNSON CONTROLS 177 Form 150 63 NM9 Issue date 5 20 2021 Notes...